Castilian and Leonese royalty
House of Trastámara
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| Henry II and I of Leon |
| Children include |
| John I |
| Eleanor, Queen of Navarre |
| John I |
| Children include |
| Henry III of Castile and II of Leon) |
| Ferdinand I of Aragon, Valencia and Sicily |
| Henry III and II of Leon |
| Children include |
| John II |
| Maria, Queen of Aragon, Valencia, Sicily and Naples |
| John II |
| Children include |
| Henry IV of Castile and III of Leon |
| Isabella I |
| Alfonso, Prince of Asturias |
| Henry IV and III of Leon |
| Children |
| Joan, Queen of Portugal |
| Isabella I with Ferdinand V |
| Children |
| Isabella, Queen of Portugal |
| Juan, Prince of Asturias |
| Joanna I |
| Maria, Queen of Portugal |
| Catherine, Queen of England |
| Joanna |
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Isabella, Princess of Asturias (2 October 1470 – 28 August 1498) was the Queen Consort of Portugal and the eldest daughter and heiress presumptive of King Ferdinand II of Aragon and Queen Isabella I of Castile. She was the sister of Catherine of Aragon.
In 1490 Isabella married Afonso, Crown Prince of Portugal, the heir of John II of Portugal. Though it was an arranged marriage, Isabella and Afonso quickly fell in love, and Isabel was grief-stricken when he died in 1491: sent home to her parents by John II, she declared that she would never marry again, and would enter a convent. Her parents ignored this, and in 1497 she was married to Manuel I of Portugal, Afonso's uncle and John II's successor. In the same year, she became Princess of Asturias and heiress of Castile, following the death of her only brother, John. In 1498, she herself died in child-birth, giving birth to Miguel da Paz, who was heir to the thrones of Castile and Portugal until his death in 1500. Manuel's chance to become king of Castile vanished with Isabella's death, and the main hope of uniting all Iberian kingdoms vanished at Miguel's death. Manuel then married Isabella's younger sister, Maria of Aragon, who bore him his son and heir John III. Portugal and Spain would themselves be united from 1580 -1640, when Manuel and Maria's grandson (by their daughter Isabella and Charles I of Spain), Philip II of Spain, successfully claimed Portugal.
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