List of Alternate Monarchs and Aristocratic Lineage

[kasumigenx]

Louis VII m. Eleanor of Aquitaine(a) Constance of Castile(b)
1a1a. Marie of France m. Conan IV, Duke of Brittany
1a2a. Alix of France m. William the Lion of Scotland
1a3b. Margaret of France m. Henry the Young King
1a4b. Alice of France m. Henry VI of HRE
1a5b. Philippe Auguste m. Isabella of Hainault
1a6b. Constance of France m. Alexios Palaiologos

 

[isabella]

Last version (hopefully) of Edward and Elizabeth‘ s family from my Elizabeth of Bedford TL plus Woodvilles
John of Lancaster, Duke of Bedford (1389–1436) married a) Anne of Burgundy (1404-1432) in 1423 b) Jacquetta of Luxembourg (1415-1472) in 1433

1b) Elizabeth of Lancaster, Duchess of Bedford (1436-1492) married Edward IV of York, King of England (1442–1485) in 1449 (consummated 1456)

1. Edward V, King of England (b. 1457) married Isabella of Viseu (b. 1459)
2. Richard, Duke of York and Burgundy (b. 1459) married Mary, Duchess of Burgundy (b. 1457)
3. Elizabeth (b. 1462) married Maximilian I, Holy Roman Emperor (b. 1459)
4. Jacquetta (1465-1470)
5. Mary (1467-1482)
6. Cecily (b. 1469) married John I, King of Denmark, Sweden and Norway (b. 1455) [or Charles VIII, King of France (b. 1470)?]
7. John, Duke of Bedford and Brittany (b. 1470) married Anne, Duchess of Brittany (b. 1477)
8. Margaret (1472-1473)
9. Edmund, Earl of March and Duke of Norfolk (b. 1473) married Anne Mowbray, Countess of Norfolk (b. 1472)
10. Anne (b. 1475) married James IV, King of Scotland (b. 1473)
11. George, Earl of Cambridge (1477-1479)
12. Catherine (b. 1479) married John, Prince of Asturias (b. 1478)

Oh, yes... Plantagenet mega wank and ATL the English and not the Habsburg will be the greatest nightmare of France...
Richard Woodville, Earl Rivers (b. 1405) married Jacquetta of Luxembourg (b. 1415/6)

1. Anthony Woodville, Earl Rivers (b. 1438) married Elizabeth Scales, Baroness Scales (b. 1436) as second husband
2. Richard Woodville (1439-1441)
3. Jacquetta Woodville (1440)
4. Lewis Woodville (1441-1446)
5. Richard Woodville (b. 1442)
6. John Woodville (b. 1444) married Catherine Neville (b.1400), Dowager Duchess of Norfolk
7. Jacquetta Woodville (b. 1446) married John Grey of Grosby (b. 1432), heir of Elizabeth Ferrers, Baroness Ferrers of Grosby
8. Anne Woodville (b. 1447) married William Bourchier, Earl of Essex (b. 1526) as second wife
9. Mary Woodville (b. 1449) married Antony Grey, Earl of Kent (b. 1446)
10. John Woodville (1451-1452)
11. Lionel Woodville, Bishop of Salisbury (b. 1453)
12. Margaret Woodville (b. 1454) married William Herbert, Earl of Monmouth (b. 1451)
13. Eleanor Jane Woodville (b. 1456) married Thomas Fitzalan, Earl of Arundel (b. 1450)
14. Edward Woodville (b. 1457)
15. Katherine Woodville (b. 1458) married Henry Tudor, Earl of Richmond and Pembroke (b. 1457)

Notes: Plantagenet mega wank and here they will be the greatest nightmare of France (in place of the Habsburg).
For the Woodville kids I followed an unusual list who looks pretty realistic to me (with the first Jacquetta in place of OTL Elizabeth). York/Bedford list follow (mostly) Elizabeth’s OTL pregnancy pattern adjusted to ATL situation (so delaying the birth of her eldest son, taking away Bridget and putting an older daughter and anticipating a little the birth of Elizabeth’s analogue for covering the discrepancies given by Edward’s age and the missing widowhood)

 

[kasumigenx]

Children of the Prince of Viana.
Charles I of Aragon and Navarre m. Madeleine of France(b)

1b. John III of Aragon and Navarre b. 1463 m. Anne of France(OTL Anne de Beaujeu) b. 1461

1b1a. Catherine of Aragon b. 1482

1b2a. Charles II of Aragon and Navarre b. 1492



2b. Isabella of Aragon b. 1468 m. Charles VIII(a)

2b1a. Charles Orland b. 1486

 

[kasumigenx]

Mary of Burgundy m. Charles, Duke of Berry(a) Philibert I of Savoy(b)

1a. Margaret of Berry b. 1474

2a. Isabelle of Berry b. 1476 m. John, Prince of Portugal and Asturias b. 1478

3b. Philip of Savoy b. 1480

4b. Charlotte of Savoy b. 1482

 

[Jan Olbracht]

1486: Frederick of Naples dies, while his half brother Charles lives. Charles succeedes Ferdinand II on the throne of Naples in 1496.

Charles IV (1480-1519) King of Naples 1496, m. Maria of Castile (1481-1517)

1) Ferdinand III (1500-1558) King of Naples 1519, m. Isabella of Austria (1501-1575)

2) Joanna (1502-1570) m. John III* (1498-1543) King of Spain

3) Isabella (1503-1549) m. Charles III (1486-1553) Duke of Savoy

4) Catherine (1505-1542) m. Ferdinand II** (1506-1561) King of Portugal

5) Charles (1508)

6) Maria (1510-1511)

7) Alfonso (1514-1536)

Charles IV of Naples is both nephew and son-in-law of Ferdinand of Aragon, there is no alliance of Ferdinand of Aragon and Louis XII and partition of Naples between them ITTL and Naples survives as separate kingdom.

* Posthumous son of John, Prince of Asturias and Margaret of Austria

** Son of Manuel I and Catherine of Aragon, who never went to England ITTL as Portugal was more important from POV of Catholic Monarchs. Arthur Tudor died unmarried and Henry VIII married Eleanor of Austria ITTL.

 

[Rose’s War]

If the Bubonic Plague present in Southern France in 1525 had swept through England, killing many. Two notable victims of this bout of the plague were Queen Katherine and Charles Brandon, Duke of Suffolk.

Henry VIII m. Katherine of Aragon (a), Anne Boleyn (b)
(mistresses who had children (acknowledged and unacknowledged): Bessie Blount (c), Mary Boleyn (d), Jane Seymour (e)) (1)
1a. stillborn girl (b. 1510)
2a. Henry, Duke of Cornwall (b. 1511-1511)
3a. short-lived boy (b. 1513)
4a. short-lived boy (b. 1514)
5a. Mary of England (b. 1516-1561) (2) - marries and has issue
6a. short-lived girl (b. 1518)
7c. Henry FitzRoy, Duke of Richmond and Somerset (b. 1519-1536) m. Lady Mary Howard (no issue)
8d. Catherine Carey (b. 1524-1569) m. Sir Francis Knollys (had issue)
9b. Edmund, Prince of Wales (eventually Edmund I of England) (b. 1527-1565) m. Marie of France (a) (3)
1a. Anne of England (b. 1547-1611)
2a. Henry, Prince of Wales (b. 1549-1554)
3a. stillborn girl (b. 1552)
4a. Frances of England (b. 1555-1630)
5a. Isabel of England (b. 1556-1575)
6a. Arthur, Prince of Wales (b. 1559-1614)
7a. Thomas, Duke of Pembroke (1562-1599)
10b. miscarriage (1528)
11b. Arthur, Duke of York and Suffolk (b. 1529-1581) m. Lady Jane Grey (a)
1a. Henry of York (b. 1553-1591)
2a. Eleanor of York (b. 1557-1571)
3a. Elizabeth of York (b. 1561-1564)
4a. Anne of York (b. 1562-1562)
12b. stillbirth (b. 1532)
13b. Elizabeth of England (b. 1533-1603) m. Philippe, Duke of Berry (a) (4)
1a. Henri de Valois (b. 1548-1550)
2a. Elisabeth de Valois (b. 1551-1567)
3a. Anne de Valois (b. 1553-1626)
4a. Charles de Valois (b. 1555-1630), eventually Charles X of France, m. Claude of France, Duchess of Brittany (8)
5a. Marie de Valois (b. 1558-1619)
14b. Anne of England (b. 1534-1553) m. Frederick II of Denmark and Norway (a)
1a. Frederick of Denmark (b. 1550-51)
2a. Christian of Denmark (b. 1553-1622)
15b. Margaret of England (b. 1537-1600) m. Eric XIV of Sweden (a), John III of Sweden (b) (5)
1a. Margaret of Sweden (b. 1552-1593)
2a. Anna of Sweden (b. 1553-1594)
3a. stillborn son (b. 1554)
4b. John of Sweden (b. 1557-1597)
5b. short-lived daughter (b. 1558)
6b. Gustav of Sweden (b. 1559-1610)
7b. Charles of Sweden (b. 1561-1632)
8b. Elizabeth of Sweden (b. 1562-1609)
9b. stillborn son (b. 1563)
10b. Johan of Sweden (b. 1565-1642)
11b. Cecilia of Sweden (b. 1570-1629)
16e. Edward Howard (b. 1537-1558) (6) m. Lady Lucy Sidney
17b. Henry, Duke of Bedford and King of Scots (b. 1540-1559) m. Mary, Queen of Scots (a)
1a. James, Duke of Rothesay (b. 1557-1558)
2a. Mary of Scotland (b. 1558-1601)
3a. Robert, Duke of Rothesay (b. 1560-1607), born posthumously


ADDITIONAL INFORMATION:

Mary Tudor, Queen of France (b. 1496-1544) (7) m. Louis XII of France (a), Charles Brandon, Duke of Suffolk (b) and Francis I of France (c)
1b. Henry Brandon (b.1516-1522)
2b. Frances Brandon (b. 1517-1559) m. Henry Grey, Marquess of Dorset (notably the mother of Lady Jane Grey, Duchess of York and Somerset)
3b. Eleanor Brandon (b. 1519-1547) m. Francis, Duke of Guise
4b. Henry Brandon, Earl of Lincoln (b. 1523-1534)
5c. Philippe, Duke of Berry (b. 1529-1591) m. Elizabeth of England
6c. Marie of France (b. 1530-1588) m. Edmund, Prince of Wales
7c. stillborn twin of Marie (b. 1530)





(1) I, personally, believe that there is enough evidence to support the idea of Catherine Carey being Henry VIII's illegitimate daughter, though I do not believe there is enough to suggest that Henry Carey is his son.
(2) Lived almost a decade longer due to a lack of circumstances that would lead to a decline in her health
(3) daughter of Mary Tudor, Queen of France (previously the Duchess of Suffolk) and Francis I of France. Francis' disobedience towards his treaty with the Emperor lead to a worsening in the conditions of his elder sons. Henri, Duke of Orleans died in captivity; Francis III, Duke of Brittany was eventually returned but soon died of poor health. A death which Francis blamed the Spanish King for
(4) eldest son of Francis I of France and Mary Tudor, Queen of France
(5) Eric XIV died under mysterious circumstances, with the blame placed on one of his many mistresses; Margaret's two daughters from her first marriage hold a strong resemblance to John III
(6) Lord Thomas Howard was released from the Tower of London (where he was imprisoned due to his secret marriage to Lady Margaret Douglas, which was invalidated) on the condition that he acknowledge Edward as his son and marry Lady Jane Seymour in return for his freedom and estates in the North. Edward lived longer without certain circumstances putting further stress on his health
(7) Lived longer as did not contract illness due to different circumstances
(8) Daughter of Charles IX of France (Duke of Angouleme), who survived until 1456

 

[Brita]

If the Bubonic Plague present in Southern France in 1525 had swept through England, killing many. Two notable victims of this bout of the plague were Queen Katherine and Charles Brandon, Duke of Suffolk.

Henry VIII m. Katherine of Aragon (a), Anne Boleyn (b)
(mistresses who had children (acknowledged and unacknowledged): Bessie Blount (c), Mary Boleyn (d), Jane Seymour (e)) (1)
1a. stillborn girl (b. 1510)
2a. Henry, Duke of Cornwall (b. 1511-1511)
3a. short-lived boy (b. 1513)
4a. short-lived boy (b. 1514)
5a. Mary of England (b. 1516-1561) (2) - marries and has issue
6a. short-lived girl (b. 1518)
7c. Henry FitzRoy, Duke of Richmond and Somerset (b. 1519-1536) m. Lady Mary Howard (no issue)
8d. Catherine Carey (b. 1524-1569) m. Sir Francis Knollys (had issue)
9b. Edmund, Prince of Wales (b. 1527-1565) m. Marie of France (a) (3)
1a. Anne of England (b. 1547-1611)
2a. Henry, Prince of Wales (b. 1549-1554)
3a. stillborn girl (b. 1552)
4a. Frances of England (b. 1555-1630)
5a. Isabel of England (b. 1556-1575)
6a. Arthur, Prince of Wales (b. 1559-1614)
7a. Thomas, Duke of York (1562-1599)
10b. miscarriage (1528)
11b. Arthur, Duke of York and Suffolk (b. 1529-1581) m. Lady Jane Grey (a)
1a. Henry of York (b. 1553-1591)
2a. Eleanor of York (b. 1557-1571)
3a. Elizabeth of York (b. 1561-1564)
4a. Anne of York (b. 1562-1562)
12b. stillbirth (b. 1532)
13b. Elizabeth of England (b. 1533-1603) m. Philippe, Duke of Berry (a) (4)
1a. Henri de Valois (b. 1548-1550)
2a. Elisabeth de Valois (b. 1551-1567)
3a. Anne de Valois (b. 1553-1626)
4a. Charles de Valois (b. 1555-1630), eventually Charles IX of France, m. Catherine de Bourbon (a) and Catherine Michelle of Spain (b)
5a. Marie de Valois (b. 1558-1619)
14b. Anne of England (b. 1534-1553) m. Frederick II of Denmark and Norway (a)
1a. Frederick of Denmark (b. 1550-51)
2a. Christian of Denmark (b. 1553-1622)
15b. Margaret of England (b. 1537-1600) m. Eric XIV of Sweden (a), John III of Sweden (b) (5)
1a. Margaret of Sweden (b. 1552-1593)
2a. Anna of Sweden (b. 1553-1594)
3a. stillborn son (b. 1554)
4b. John of Sweden (b. 1557-1597)
5b. short-lived daughter (b. 1558)
6b. Gustav of Sweden (b. 1559-1610)
7b. Charles of Sweden (b. 1561-1632)
8b. Elizabeth of Sweden (b. 1562-1609)
9b. stillborn son (b. 1563)
10b. Johan of Sweden (b. 1565-1642)
11b. Cecilia of Sweden (b. 1570-1629)
16e. Edward Howard (b. 1537-1558) (6) m. Lady Lucy Sidney
17b. Henry, Duke of Bedford and King of Scots (b. 1540-1559) m. Mary, Queen of Scots (a)
1a. James, Duke of Rothesay (b. 1557-1558)
2a. Mary of Scotland (b. 1558-1601)
3a. Robert, Duke of Rothesay (b. 1560-1607), born posthumously


ADDITIONAL INFORMATION:

Mary Tudor, Queen of France (b. 1496-1544) (7) m. Louis XII of France (a), Charles Brandon, Duke of Suffolk (b) and Francis I of France (c)
1b. Henry Brandon (b.1516-1522)
2b. Frances Brandon (b. 1517-1559) m. Henry Grey, Marquess of Dorset (notably the mother of Lady Jane Grey, Duchess of York and Somerset)
3b. Eleanor Brandon (b. 1519-1547) m. Francis, Duke of Guise
4b. Henry Brandon, Earl of Lincoln (b. 1523-1534)
5c. Philippe, Duke of Berry (b. 1529-1591) m. Elizabeth of England
6c. Marie of France (b. 1530-1588) m. Edmund, Prince of Wales
7c. stillborn twin of Marie (b. 1530)





(1) I, personally, believe that there is enough evidence to support the idea of Catherine Carey being Henry VIII's illegitimate daughter, though I do not believe there is enough to suggest that Henry Carey is his son.
(2) Lived almost a decade longer due to a lack of circumstances that would lead to a decline in her health
(3) daughter of Mary Tudor, Queen of France (previously the Duchess of Suffolk) and Francis I of France. Francis' disobedience towards his treaty with the Emperor lead to a worsening in the conditions of his elder sons. Henri, Duke of Orleans died in captivity; Francis III, Duke of Brittany was eventually returned but soon died of poor health. A death which Francis blamed the Spanish King for
(4) eldest son of Francis I of France and Mary Tudor, Queen of France
(5) Eric XIV died under mysterious circumstances, with the blame placed on one of his many mistresses; of Margaret's two daughters from her first marriage hold a strong resemblance to John III
(6) Lord Thomas Howard was released from the Tower of London (where he was imprisoned due to his secret marriage to Lady Margaret Douglas, which was invalidated) on the condition that he acknowledge Edward as his son and marry Lady Jane Seymour in return for his freedom and estates in the North. Edward lived longer without certain circumstances putting further stress on his health
(7) Lived longer as did not contract illness due to different circumstances

Looks very interesting. Who succeeds Francis I btw? Probably his third son by Claude, whose death can be easily butterflied, or his sons by Mary?

 

[Brita]

13b. Elizabeth of England (b. 1533-1603) m. Philippe, Duke of Berry (a) (4)
1a. Henri de Valois (b. 1548-1550)
2a. Elisabeth de Valois (b. 1551-1567)
3a. Anne de Valois (b. 1553-1626)
4a. Charles de Valois (b. 1555-1630), eventually Charles IX of France, m. Catherine de Bourbon (a) and Catherine Michelle of Spain (b)
5a. Marie de Valois (b. 1558-1619)

Oops. Forget the question. Of course if Elizabeth's son is Charles IX, then Francis's third son just can't be king.
Who is Catherine Michelle though? If OTL Henry II dies in captivity, he can't marry Catherine of Medici and have children. Would be interesting to see who Catherine will marry here.

 

[isabella]

Oops. Forget the question. Of course if Elizabeth's son is Charles IX, then Francis's third son just can't be king.
Who is Catherine Michelle though? If OTL Henry II dies in captivity, he can't marry Catherine of Medici and have children. Would be interesting to see who Catherine will marry here.
R

The interesting thing is what will happen to Brittany here? If none of the sons of Francis and Claude became King of France then Brittany will be inherited by their sister Marguerite (as Madeleine is already dead) and that will imply an earlier and different wedding for her.
Charles need to live at least until 1550 and have a daughter who can marry her cousin Charles (in place of Catherine de Bourbon) and give him an heir. Plus Catherine Michelle here will most likely not exist as her mother will never be born...
also @Rose’s War you have given to the second son of Edmund, Prince of Wales (but he would be more likely called as Edmund I, King of England) the Dukedom of York who he can not have as it already belong to his uncle and will be inherited by his cousin. Changing his Dukedom with either Somerset or Pembroke would be more appropriated

 

[HortenseMancini]

The interesting thing is what will happen to Brittany here? If none of the sons of Francis and Claude became King of France then Brittany will be inherited by their sister Marguerite (as Madeleine is already dead) and that will imply an earlier and different wedding for her.

Perhaps she can marry Edmund Tudor instead of her half sister. He’s a bit younger than her but i think it could work.

 

[Kellan Sullivan]

An idea I was discussing with @Zulfurium, namely what if John of Gaunt and Constance of Castile had had more kids. Katherine, likely as not would not end up marrying the king of Castile with a surviving brother much less two, since her not being the only child of her parents would mean that the Trastamaras don't amalgamate the line of Pedro the Cruel TTL.

John, Duke of Lancaster (1340-1399) m: 1371 Constanca of Castile (1354-1394)

Katherine (b.1372)​

John (1375-1375)​

Edward (b.1379)​

Peter (b.1382)​

Mary (b.1383)​

@The Professor @isabella @VVD0D95 @curlyhairedhippie @Kurt_Steiner

 

[vandevere]

An idea I was discussing with @Zulfurium, namely what if John of Gaunt and Constance of Castile had had more kids. Katherine, likely as not would not end up marrying the king of Castile with a surviving brother much less two, since her not being the only child of her parents would mean that the Trastamaras don't amalgamate the line of Pedro the Cruel TTL.

John, Duke of Lancaster (1340-1399) m: 1371 Constanca of Castile (1354-1394)

Katherine (b.1372)​

John (1375-1375)​

Edward (b.1379)​

Peter (b.1382)​

Mary (b.1383)​

@The Professor @isabella @VVD0D95 @curlyhairedhippie @Kurt_Steiner

If that happened, it's very likely it would Butterfly Gaunt's marriage to Katherine Swynford, and that would Butterfly the Beauforts too, and that would definitely Butterfly the Tudors too...

 

[VVD0D95]

If that happened, it's very likely it would Butterfly Gaunt's marriage to Katherine Swynford, and that would Butterfly the Beauforts too, and that would definitely Butterfly the Tudors too...

Well the Beaufort would still be there they’d just be illegitimate

 

[Rose’s War]

The interesting thing is what will happen to Brittany here? If none of the sons of Francis and Claude became King of France then Brittany will be inherited by their sister Marguerite (as Madeleine is already dead) and that will imply an earlier and different wedding for her.
Charles need to live at least until 1550 and have a daughter who can marry her cousin Charles (in place of Catherine de Bourbon) and give him an heir. Plus Catherine Michelle here will most likely not exist as her mother will never be born...
also @Rose’s War you have given to the second son of Edmund, Prince of Wales (but he would be more likely called as Edmund I, King of England) the Dukedom of York who he can not have as it already belong to his uncle and will be inherited by his cousin. Changing his Dukedom with either Somerset or Pembroke would be more appropriated

Thank you for pointing that out! Yes, I'll change it to Pembroke. I haven't really put too much thought into what would happen to the Dukedom of Brittany, it would go to Margaret of France, Duchess of Savoy and her son could instead be born a female and the hypothetical Claude of Savoy could marry Charles IX? Though that could have ramifications to do with the French gaining Savoy. Do you have any suggestions?

 

[FalconHonour]

If that happened, it's very likely it would Butterfly Gaunt's marriage to Katherine Swynford, and that would Butterfly the Beauforts too, and that would definitely Butterfly the Tudors too...

It wouldn't butterfly the Beauforts. They were all born prior to John's marriage to Katherine. They wouldn't be legitimised, true - which would mean they wouldn't make such good marriages, but they would all still be around...

 

[The Professor]

An idea I was discussing with @Zulfurium, namely what if John of Gaunt and Constance of Castile had had more kids. Katherine, likely as not would not end up marrying the king of Castile with a surviving brother much less two, since her not being the only child of her parents would mean that the Trastamaras don't amalgamate the line of Pedro the Cruel TTL.

John, Duke of Lancaster (1340-1399) m: 1371 Constanca of Castile (1354-1394)

Katherine (b.1372)​

John (1375-1375)​

Edward (b.1379)​

Peter (b.1382)​

Mary (b.1383)​

@The Professor @isabella @VVD0D95 @curlyhairedhippie @Kurt_Steiner

If that happened, it's very likely it would Butterfly Gaunt's marriage to Katherine Swynford, and that would Butterfly the Beauforts too, and that would definitely Butterfly the Tudors too...

As others have said the Beauforts don't get legitimised. However if they are as useful as OTL they could still end up ennobled and tied to the various English houses, just not the throne.
As regards the throne, Edward and perhaps Peter of Lancaster will contest for both/either Leon and Castile, which could have interesting butterflies there. Especially as regards any future unions with Aragon, Portugal, or Navarre.
Failure but survival will bring them back to England and impact on the House of Lancaster even if not on the throne.

 

[Jan Olbracht]

An idea I was discussing with @Zulfurium, namely what if John of Gaunt and Constance of Castile had had more kids. Katherine, likely as not would not end up marrying the king of Castile with a surviving brother much less two, since her not being the only child of her parents would mean that the Trastamaras don't amalgamate the line of Pedro the Cruel TTL.

John, Duke of Lancaster (1340-1399) m: 1371 Constanca of Castile (1354-1394)

Katherine (b.1372)​

John (1375-1375)​

Edward (b.1379)​

Peter (b.1382)​

Mary (b.1383)​

@The Professor @isabella @VVD0D95 @curlyhairedhippie @Kurt_Steiner

If Catherine of Lancaster is not going to Castile (as she'd be not main heiress of Peter the Cruel) what is going to happen with her?

 

[Kellan Sullivan]

If Catherine of Lancaster is not going to Castile (as she'd be not main heiress of Peter the Cruel) what is going to happen with her?

Will admit that I haven't given much thought to marriage partners. Should I make a separate thread that we don't clog this one with our discussion?

 

[Jan Olbracht]

Will admit that I haven't given much thought to marriage partners. Should I make a separate thread that we don't clog this one with our discussion?

Why not? I like Lancastrian PODs and that is particulary interesting one.

 

[isabella]

Thank you for pointing that out! Yes, I'll change it to Pembroke. I haven't really put too much thought into what would happen to the Dukedom of Brittany, it would go to Margaret of France, Duchess of Savoy and her son could instead be born a female and the hypothetical Claude of Savoy could marry Charles IX? Though that could have ramifications to do with the French gaining Savoy. Do you have any suggestions?

I would go for the easier route (and Savoy is inheritable in male line only and that question need to be resolved with Margaret's marriage I will not change anything here) so keep Francis I and his son Charles alive until early 1450s and have the latter marrying with only a surviving daughter who can inherit Brittany but not the French crown... Francis in OTL died at 52 years old in 1547... having him survive another ten years is not impossible (or Charles will survive, have a short reign as Charles IX, then died leaving a daughter as heiress of Brittany and France to his half-brother (whose son will rule as Charles X)