John II of Castile has one more son with Maria of Aragon (Alfonso, b. 1428)
Alfonso XII (1428-1488) King of Castile 1474* m. Isabella of Portugal (1428-1496)
1) Isabella (1450-1454)
2) John (1453-1480) Prince of Asturias, m. Joanna of Portugal (1452-1490)
3) Maria (1455-1527) m. Ferdinand II (1452-1516) King of Aragon
4) Joanna (1456-1502) m. John II (1455-1495) King of Portugal
5) Alfonso (1458)
6) Beatrice (1460-1465)
7) Ferdinand VI (1461-1512) King of Navarre iure uxoris 1484, King of Castile 1488, m. Catherine of Navarre (1468-1517)
8) James (1463)
9) Isabella (1468-1524) m. Edward V (1470-1514) King of England
* La Beltraneja is never born ITTL, and John II of Castile has less inective to remarry having spare son (who marries his OTL wife).
Alfonso XII (1428-1488) King of Castile 1474* m. Isabella of Portugal (1428-1496)
1) Isabella (1450-1454)
2) John (1453-1480) Prince of Asturias, m. Joanna of Portugal (1452-1490)
3) Maria (1455-1527) m. Ferdinand II (1452-1516) King of Aragon
4) Joanna (1456-1502) m. John II (1455-1495) King of Portugal
5) Alfonso (1458)
6) Beatrice (1460-1465)
7) Ferdinand VI (1461-1512) King of Navarre iure uxoris 1484, King of Castile 1488, m. Catherine of Navarre (1468-1517)
8) James (1463)
9) Isabella (1468-1524) m. Edward V (1470-1514) King of England
* La Beltraneja is never born ITTL, and John II of Castile has less inective to remarry having spare son (who marries his OTL wife).