Afonso I | |
|---|---|
| Duke of Braganza | |
 posthumous engraving; Carlos António Leoni | |
| Tenure | 30 December 1442 – 15 December 1461 |
| Born | 10 August 1377 Veiros, Estremoz, Alentejo, Portugal |
| Died | 15 December 1461 (aged 84) Chaves, Trás-os-Montes, Portugal |
| Family | House of Braganza |
| Spouses | Beatriz Pereira de Alvim (m. 1400, d. 1415) Constance de Noronha |
| Issue Detail | |
| Father | John I of Portugal |
| Mother | Inês Peres |
Dom Afonso I of Braganza (Portuguese pronunciation: [ɐˈfõsu]; 10 August 1377 – 15 December 1461) was the first duke of Braganza and the eighth count of Barcelos. He founded the House of Braganza, the most powerful and wealthy dynasty in Portugal. His descendants became high-ranking nobles, imperial officials, and finally kings of Portugal and emperors of Brazil.