WI Edward IV manages to live till his 50s-60s?

You forget one important thing; Edward IV had a very big belly and a very poor diet -- historians now believe it was either a stroke of type II diabetes that killed him -- and if you add on another ten years, he'll be as fat as OTL Henry VIII, if not fatter.

Edward has to shed some pounds or improve in his eating habits and fitness if you want him to live longer; he's got type II diabetes and almost morbid obesity to shed off in 1483 as it is!
 
You forget one important thing; Edward IV had a very big belly and a very poor diet -- historians now believe it was either a stroke of type II diabetes that killed him -- and if you add on another ten years, he'll be as fat as OTL Henry VIII, if not fatter.

Edward has to shed some pounds or improve in his eating habits and fitness if you want him to live longer; he's got type II diabetes and almost morbid obesity to shed off in 1483 as it is!

Yet Henry VIII lived to age 55.
 
Yet Henry VIII lived to age 55.

Henry VIII didn't really pile on weight until 1539; his weight ballooned after that -- and he was already forty eight, seven years OLDER than Edward IV. Henry VIII might have lived longer -- but Edward became fatter younger; Edward was putting on weight at 33 (Conyers mentions it!) but Henry didn't start blimping up until his jousting accident at 45! Edward went to pot a long younger, which would make him bigger than his grandson when they reach the same age!
 
Edward IV of England (b.1442: d.1490) m. Elizabeth Woodville (b.1437: d.1492) (a)

1a) Elizabeth of York (b.1466) m. Manuel I of Portugal (b.1469) (a)

1a) Duarte of Beja (b.1486: d.1491)

2a) Manuel, Prince of Portugal (b.1488)

3a) Beatrice of Portugal (b.1491)

4a) Luis, Duke of Beja (b.1494)

5a) Isabel of Portugal (b.1497: d.1497)

6a) Ferdinand, Duke of Guarda (b.1499: d.1499)​

2a) Mary of York (b.1467: d.1482)

3a) Cecily of York (b.1469) m. James IV of Scotland (b.1473) (a)

1a) James Stewart, Duke of Rothesay (b.1492: d.1499)

2a) Alexander Stewart, Duke of Rothesay (b.1495)

3a) Robert Stewart, Duke of Ross (b.1498: d.1499)

4a) James Stewart, Duke of Ross (b.1501)

5a) Robert Stewart (b.1503: d.1503)​

4a) Edward V of England (b.1470) m. Anne of Orléans (b.1464: d.1495) (a), Maria of Aragon (b.1482) (b)

1a) Miscarriage (c.1490)

2b) Edward, Prince of Wales (b.1499)

2a) Richard, Duke of Gloucester (b.1500)

3a) Margaret of England (b.1502)

4a) Catherine of England (b.1504)

5a) Edmund, Duke of Lancaster (b.1505: d.1506)

6a) Isabel of England (b.1507)

7a) Stillborn Boy (c.1509)

8a) Stillborn Boy (c.1511)

9a) Mary of England (b.1513)​

5a) Margaret of York (b.1472: d.1472)

6a) Richard, Duke of York (b.1473) m. Anne de Mowbray, 8th Countess of Norfolk (b.1472: d.1481) (a), Elizabeth Howard (b.1479/1480) (b)

1a) Mary of York (b.1499)

2a) Richard of York (b.1502)

3a) Edward of York (b.1503)

4a) John of York (b.1505)

5a) Margaret of York (b.1507)

6a) William of York (b.1510)​

7a) Anne of York (b.1475: d.1502) m. William III, Landgrave of Hesse (b.1471: d.1500) (a)

1a) Matilda of Hesse (b.1492: d.1492)

2a) Elizabeth of Hesse (b.1497: d.1499)​

8a) George, Duke of Bedford (b.1477: d.1479)

9a) Catherine of York (b.1479) m. Henry IV, Duke of Saxony (b.1473: d.1547) (a)

1a) Catherine of Saxony (b.1500)

2a) Henry of Saxony (b.1501)

3a) John of Saxony (b.1503)

4a) Sibylle of Saxony (b.1505)

5a) Maurice of Saxony (b.1506)

6a) Elizabeth of Saxony (b.1508)

7a) Margaret of Saxony (b.1510)​

10a) Bridget of York (b.1480: d.1505)

11a) Edmund, Duke of Bedford (b.1482: d.1500)​
 
Edward IV of England (b.1442: d.1490) m. Elizabeth Woodville (b.1437: d.1492) (a)
1a) Elizabeth of York (b.1466) m. Manuel I of Portugal (b.1469) (a)
1a) Duarte of Beja (b.1486: d.1491)

2a) Manuel, Prince of Portugal (b.1488)

3a) Beatrice of Portugal (b.1491)

4a) Luis, Duke of Beja (b.1494)

5a) Isabel of Portugal (b.1497: d.1497)

6a) Ferdinand, Duke of Guarda (b.1499: d.1499)​
2a) Mary of York (b.1467: d.1482)

3a) Cecily of York (b.1469) m. James IV of Scotland (b.1473) (a)
1a) James Stewart, Duke of Rothesay (b.1492: d.1499)

2a) Alexander Stewart, Duke of Rothesay (b.1495)

3a) Robert Stewart, Duke of Ross (b.1498: d.1499)

4a) James Stewart, Duke of Ross (b.1501)

5a) Robert Stewart (b.1503: d.1503)​
4a) Edward V of England (b.1470) m. Anne of Orléans (b.1464: d.1495) (a), Maria of Aragon (b.1482) (b)
1a) Miscarriage (c.1490)

2b) Edward, Prince of Wales (b.1499)

2a) Richard, Duke of Gloucester (b.1500)

3a) Margaret of England (b.1502)

4a) Catherine of England (b.1504)

5a) Edmund, Duke of Lancaster (b.1505: d.1506)

6a) Isabel of England (b.1507)

7a) Stillborn Boy (c.1509)

8a) Stillborn Boy (c.1511)

9a) Mary of England (b.1513)​
5a) Margaret of York (b.1472: d.1472)

6a) Richard, Duke of York (b.1473) m. Anne de Mowbray, 8th Countess of Norfolk (b.1472: d.1481) (a), Elizabeth Howard (b.1479/1480) (b)
1a) Mary of York (b.1499)

2a) Richard of York (b.1502)

3a) Edward of York (b.1503)

4a) John of York (b.1505)

5a) Margaret of York (b.1507)

6a) William of York (b.1510)​
7a) Anne of York (b.1475: d.1502) m. William III, Landgrave of Hesse (b.1471: d.1500) (a)
1a) Matilda of Hesse (b.1492: d.1492)

2a) Elizabeth of Hesse (b.1497: d.1499)​
8a) George, Duke of Bedford (b.1477: d.1479)

9a) Catherine of York (b.1479) m. Henry IV, Duke of Saxony (b.1473: d.1547) (a)
1a) Catherine of Saxony (b.1500)

2a) Henry of Saxony (b.1501)

3a) John of Saxony (b.1503)

4a) Sibylle of Saxony (b.1505)

5a) Maurice of Saxony (b.1506)

6a) Elizabeth of Saxony (b.1508)

7a) Margaret of Saxony (b.1510)​
10a) Bridget of York (b.1480: d.1505)

11a) Edmund, Duke of Bedford (b.1482: d.1500)​

The only thing I didn't get is Edward V's marriages -- 2b is before 2a. Who had who?
 
A surviving Edward V will be surely married with his bethroted Anne of Brittany not Anne of Orleans and either Anne or Catherine will be likely married to Juan, Prince of the Asturias for two reasons: first this possible wedding was talked about and second because Juan's OTL will not be free
(Margaret of Austria was engaged to Charles VIII and with Anne of Brittany married to Edward he and his sister will keep this wedding). Either of them is also a candidate as wife for Philip of Burgundy instead of Juana of Spain (Philip's stepgrandmother was Edward IV' younger sister so will likely favoured one of her nieces as next Duchess).
 
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