Again from a scenario suggested by someone else (in this case the inspiration was
@Kellan Sullivan's "What if Mary Tudor became Queen of England in 1541?")
Massive Habsburg wank
Habsburg tree around 1560 (with some spoilers)
Karl V, Holy Roman Emperor (1500-1560), King of Spain and Duke of Burgundy marry a)
Isabella of Portugal (1503-1539) in 1526 b)
Mary Tudor, Queen of England (1516-1562) in 1542
1a)
Felipe II, King of Spain (1527-?) married a)
Maria Manuela of Portugal (1527-1545) in 1543 b)
Christina of Denmark (1521-?) in 1547
1a)
Carlos, Prince of Asturias (1545-?), later
Carlos II King of Spain (Castile, Aragon and Portugal) married
Elisabeth of Valois (1545-?) in 1560
1) miscarriage (1665)
2) Isabella II, Queen of Spain (1566-?) married Infante Ferdinand of Spain (1555-?)*
3) Felipe (1568-1572)
4) miscarried son (1571)
2b)
Juan (1549-?), cardinal
3b)
Isabella Clara Eugenia (1552-?)
married Ernest of Austria (1553-?)
4b)
Ferdinand VI, King of Spain (1555-?) married
Isabella II of Spain (1566-?)*
2a)
Maria (1528-?), Queen of the Romans married
Maximilian of Austria (1527-?) in 1548
3a) Ferdinand (1529-1530)
4a) stillborn son (1534)
5a)
Juana (1535-?), Princess of Portugal married João Manuel, Prince of Portugal (1537-1554) in 1552
6a) Juan (1537-1538)
7a) miscarried son (1539)
8b)
Henry IX Philip, King of England (1543-?) married
Marie Stuart, Queen of Scotland (1542-?) in 1558
9b)
Katherine Isabella (1545-?) married
Francis II, King of France (1544-?) in 1562
10b) stillborn daughter (1548)
11b)
Charles Edward, Duke of York (1550-?)
Ferdinand I, Holy Roman Emperor (1503-1564), King of Hungary and Bohemia married
Anna of Bohemia and Hungary (1503–1547) in 1521
1) Elisabeth (1526-1545) married
Sigismund II Augustus, King of Poland
2)
Maximilian II, King of the Romans (1527-?) married
Maria of Spain (1528-?) in 1548
1) Anne of Austria (1549-1569) married Sigismund III of Poland in 1565
2) Ferdinand of Austria (1551-1552)
3) Rudolf of Austria (1552-1558)
4) Ernest of Austria (1553-?) married Isabella Clara Eugenia of Spain (1552-)
5) Elisabeth of Austria (1554-?)
6) Maria of Austria (1555-1556)
7) Matthias of Austria (1557-?)
8) stillborn son (1557)
9) Maximilian of Austria (1558-?), grandmaster of the Teutonic Order
10) Albert of Austria (1559-?), cardinal
11) Wenceslaus of Austria (1561-1578)
12) Frederick of Austria (1562-1563)
13) Maria of Austria (1564-1564)
14) Charles of Austria (1565-1566)
15) Margaret of Austria (1567-?), nun
16) Eleonore of Austria (1568-1580)
3)
Anna (1528-?) married
Albert V, Duke of Bavaria (1528-?) in 1546
4)
Ferdinand II, Archduke of Austria (1529-) married a)
Isabella Jagiellon of Poland (1519-1548) in 1544 b)
Elizabeth of England (1533-?) in 1550
1a)
Sigismund III, King of Poland (1545-?) married a)
Anne of Austria (1549-1569) in 1565
1a) Sigismund (1566-?)
2a) stillborn daughter (1567)
3a) miscarriage (1567)
4a) Ferdinand (1569-?)
2a)
Isabella Beatrice (1548-?) married
Charles II, Archduke of Austria (1540-?) in 1564
3b)
Maximilian (1552-?)
4b)
Ferdinand (1555-?)
5b)
Anna Elisabeth (1559-?)
5)
Maria (1531-?) married
Wilhelm, Duke of Jülich-Cleves-Berg
6)
Magdalena (1532-?), nun
7)
Catherine (1533-?) married
Francesco III, Duke of Mantua
8)
Eleanor (1534-?) married
William I, Duke of Mantua
9)
Margaret (1536-?), nun
10) John (1538-1539)
11)
Barbara (1539-?) married
Alfonso II, Duke of Ferrara and Modena
12)
Charles II, Archduke of Austria (1540-?) married
Isabella Beatrice of Austria (1548-?) in 1564
13) Ursula (1541-1543)
14)
Helena (1543-?), nun
15)
Joanna (1547-?) married
Francesco I de' Medici, Grand Duke of Tuscany
Manuel I, King of Portugal (1469-1521) married a)
Isabella of Aragon and Castile (1470-1498) in 1497 b)
Maria of Aragon (1482-1517) in 1500 c)
Eleanor of Austria (1498-?) in 1518
1a) Miguel da Paz, Prince of Portugal, Asturias and Girona (1498-1500)
2b)
João III, King of Portugal (1502-1557) married
Catalina of Austria (1507-?) in 1525
1) Afonso, Prince of Portugal (1526-1526)
2) Maria Manuela (1527-1545), Princess of Asturias married
Felipe II of Spain (1527-?) in 1543
3) Isabel (1529)
4) Beatriz (1530)
5) Manuel, Prince of Portugal (1531-1537)
6) Filipe, Prince of Portugal (1533-1539)
7) Dinis (1535-1537)
8) João Manuel, Prince of Portugal (1537-1554) married
Juana of Spain (1535-?) in 1552
1) Sebastian I, King of Portugal (1554-1568) engaged to Marguerite of Valois (1553-?)
9) António (1539-1540)
3b)
Isabella (1503-1539), Holy Roman Empress and Queen of Spain married
Karl V, Holy Roman Emperor (1500-?) in 1526
4b)
Beatriz (1504-1538), Duchess of Savoy married
Charles III, Duke of Savoy (1486-1553) in 1521
1) Adriano Giovanni Amadeo, Prince of Piedmont (1522-1523)
2) Ludovico, Prince of Piedmont (1523-1536)
3)
Emanuele Filiberto, Duke of Savoy (1528-?) married
Marguerite, Duchess of Berry (1523-?) in 1559
1) Carlo Emanuele, Prince of Piedmont (1562-)
4) Caterina (1529-1536)
5) Maria (1530-1531)
6) Isabella (1532-1533)
7) Emanuele (1533)
8) Emanuele (1534)
9) Giovanni (1537-1538)
5b)
Luís, Duke of Beja (1506-1555)
6b)
Fernando, Duke of Guarda (1507-1534) married
Guiomar Coutinho (c.1507-1534)
1) Luísa (1531-1534)
2) stillborn son (1534)
7b)
Afonso (1509–1540), Cardinal
8b)
Henrique (1512-) Cardinal
9b) Maria (1513)
10b)
Duarte, Duke of Guimarães (1515-1540) married
Isabella of Braganza (1514-?) in 1535
1) Maria of Guimarães (1538–1577), married Alessandro Farnese, Duke of Parma and Piacenza (1545-?) in 1565
2) Catarina of Guimarães (1540–?), Duchess of Braganza married John, 6th Duke of Braganza (1543-?) in 1563
3) Duarte II, 5th Duke of Guimarães (1541–?)
11b) António (1516)
12c) Carlos (1520-1521)
13c)
Maria, Duchess of Viseu (1521-?) married
Charles III, Duke of Savoy (1486-1553) in 1547
1) Eleonora (1548-?) married Charles Maximilian of France, Duke of Orleans (1550-?) in 1564
2) Amedeo (1552-?)
Henry VIII, King of England (1491-1541) married a)
Catherine of Aragon (1485–1536) in 15 annulled 1533, b)
Anne Boleyn (c.1501–1536) in 1533 c)
Jane Seymour (c.1508-1537) in 1536 d)
Anne of Cleves (c.1515–1557) in 1540 annulled 1540 e)
Catherine Howard (c.1523–?) in 1540
1a) stillborn daughter (1510)
2a) Henry, Duke of Cornwall (1511-1511)
3a) stillborn son (1513)
4a) stillborn son (1515)
5a) Mary, Queen of England (1516-?), Holy Roman Empress and Duchess of Burgundy married Karl V, Holy Roman Emperor (1500-?), King of Spain and Duke of Burgundy in 1542
6a) miscarried daughter (1518)
7b) Elizabeth (1533-?) married Archduke Ferdinand of Austria (1529-?) in 1550
8b) miscarried son (1534)
9b) miscarried son (1536)
10b) Edward, Prince of Wales (1537-1541)
Notes:
*Spain's numeration follow that of Castile. I am pretty sure who Ferdinand VI of Spain will be also called Ferdinand III in Aragon and Ferdinand II in Portugal. I ended giving only a surviving daughter to Carlos and Isabella and then marrying her to her half-uncle (under order of Felipe II) was quite natural... Plus another Isabella and Ferdinand on the Spanish throne? I was unable to resist...
** After the death of Sebastian few months before their wedding Marguerite will elope with Henry of Guise while her mother was defining the details of her engagement to the heir of Navarre... The chronicles reported who the King Francis' reaction to the news and the fury of his mother in reporting that was a prolonged laugh and this request: "Mother, please... Now you can stop to intrigue?"... In many suspected who the King had blessed the escape as he was against the Navarrese's match and liked Guise but feared his mother's reaction...
Francis II is born healthier and will live and reign many years and have children by Katherine, his sister Claude will be married to the Duke of Lorraine as OTL. Henry II died as OTL during the tournament for the wedding of Elisabeth to the Prince of Asturias but Catherine de'Medici here will never be in power as regent and instead will be remembered as the feared French "Queen of Intrigues" and for being the cause of her children's embarrasses and exasperation (King Francis II most cited quote was "You know my mother, there is little who I can do..."). In the end Francis exiled her in her lands of Auvergne and Boulogne in 1573...
I know who maybe I have put too many intermarriages here but really European royals were almost all kins and after inheriting Spain the Habsburg had developed a strong tendency to marry in the family so...
I have not thought too much to the children for both Francis II of France and Henry IX of England but I know who Henry IX' eldest son will be Charles II James, King of England, Scotland, Ireland and Duke of Burgundy and Lord of the Netherlands and he will be a good friend of his cousin Charles IX of France (who will marry his cousin Christine of Lorraine, only surviving daughter and heiress of Charles III and Claude of France)
As was asked why Sigismund of Austria and not Johan Vasa as king of Poland after Sigismund II:
Isabella of Poland died when her son was three and the boy was under Elizabeth’s supervision (who was a great supporter of her stepson as heir of Poland, as that would have made her sons as heirs of their father) starting from four years. Sigismund II here never married Catherine of Austria because Barbara Radzwill lived but they remained childless. When Sigismund was around ten year old, his stepmother sent him to his uncle in Poland as ward and the Sejm pretty much accepted him as heir (in OTL they were pretty desperate to have an heir from Sisgimund). Johan is only married to a Jagiellon princess while Sigismund is son and grandson of two Jagiellon princesses and was partially raised in Poland and his wedding to Archduchess Anne was arranged between Sigismund II and Maximilian II. So I do not think who Johan will have great chances against someone who is practically a Polish prince with just the wrong surname...