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Portuguese royalty
House of Aviz
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| John I |
| Children |
| Infante Duarte (future Edward I) |
| Infante Pedro, Duke of Coimbra |
| Henry the Navigator (Infante Henrique, Duke of Viseu) |
| Infanta Isabel, Duchess of Burgundy |
| Infante João |
| Infante Fernando, the Saint Prince |
| Afonso, Duke of Braganza (illegitimate) |
| Beatriz, Countess of Arundel (illegitimate) |
| Grandchildren include |
| Infanta Isabel of Coimbra, Queen of Portugal |
| Edward |
| Children |
| Infante Afonso (future Afonso V) |
| Infante Fernando, Duke of Viseu |
| Infanta Leonor, Holy Roman Empress |
| Infanta Catarina |
| Infanta Joana, Queen of Castile |
| Grandchildren include |
| Infante Manuel, Duke of Beja (future Manuel I) |
| Infanta Leonor of Viseu, Queen of Portugal |
| Afonso V |
| Children include |
| Blessed Joana, Crown Princess of Portugal |
| Infante João (future John II) |
| John II |
| Afonso, Crown Prince of Portugal |
| Jorge, Duke of Coimbra (illegitimate) |
| Manuel I |
| Children include |
| Miguel da Paz, Crown Prince of Spain and Portugal |
| Infante João (future John III) |
| Infanta Isabel, Holy Roman Empress |
| Infanta Beatriz, Duchess of Savoy |
| Infante Luís, Duke of Beja |
| Infante Fernando, Duke of Guarda and Trancoso |
| Infante Cardinal Afonso |
| Infante Cardinal Henrique (future Henry I) |
| Infante Duarte, Duke of Guimarães |
| Infanta Maria |
| Grandchildren include |
| Philip II of Spain (future Philip I of Portugal) |
| António, Prior of Crato (future Anthony I) (illegitimate) |
| Infanta Maria of Guimarães, Duchess of Parma and Piacenza |
| Infanta Catarina of Guimarães, Duchess of Braganza |
| Great-Grandchildren include |
| Teodósio II, Duke of Braganza |
| Rannuccio Farnense of Parma |
| Great-Great-Grandchildren include |
| John II, Duke of Braganza (future John IV of Portugal) |
| John III |
| Children include |
| Infanta Maria Manuela, Princess of Asturias |
| João, Crown Prince of Portugal |
| Grandchildren include |
| Infante Sebastião (future Sebastian I) |
| Carlos, Prince of Asturias |
| Sebastian |
| Henry |
| Anthony (disputed king) |
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Ferdinand, Prince of Portugal, Duke of Viseu (1433–, Portuguese: Fernando, pron. IPA [fɨɾ'nɐ̃du]) was the third son of Portuguese King Edward of Portugal and his wife Leonor of Aragon.
Ferdinand was born in Almeirim on November 17, 1433. He became Duke of Viseu when his uncle Henry the Navigator died in 1460. He also succeeded his uncle as Master of the Order of Aviz and responsible for the Discoveries (1460-1470).
He married his cousin Beatrice of Portugal (Portuguese: Beatriz) in 1447, daughter of John, Duke of Aveiro (his uncle).
From that marriage Ferdinand had nine children:
- João (1448-1472), 3rd Duke of Viseu, 2nd Duke of Beja, 6th general of the kingdom.
- Diogo (1450-1484), 4th Duke of Viseu, 3rd Duke of Beja.
- Duarte
- Dinis
- Simão
- Leonor of Portugal (1458-1525), married John II of Portugal and became Queen of Portugal.
- Isabel of Portugal (1459-1521), married Ferdinand II, Duke of Braganza,
- Manuel I of Portugal, king of Portugal after the death of his cousin John II of Portugal
- Catarina
