Isabella I Queen of Castile and Leon

Paternal Side

• John II King of Castile & Leon 1405 - 1454  (49 years)

• Henry King of Castile 1379 - Yes, date unknown
• PLANTAGENET, Lady Katherine Catalina De Lancaster 1372 - 1418  (46 years)

• Eleanor of Aragon 1358 - Yes, date unknown
• PLANTAGENET, John 1st Duke of Lancaster 1340 - 1398  (57 years)
• PEREZ, Costanza De Castile & Leon 1354 - Yes, date unknown

PORTUGAL Side

• PORTUGAL, Isabella of Abt 1426 - 1496  (70 years)

• PORTUGAL, Joao of Grand Master of Santiago 1400 - Yes, date unknown
• BRAGANCA, Isabella De 1402 - Yes, date unknown

• John I of Aviz, King of Portugal 1357 - 1433  (76 years)
• PLANTAGENET, Phillipa de Lancaster 1360 - 1415  (55 years)
• BRAGANCA, Alfonso De Duke of Braganza Abt 1377 - 1461  (84 years)
• PEREIRA, Beatriz Countess of Barcellos Abt 1380 - Abt 1412  (32 years)