Infante Afonso of Portugal (8 February 1263, in Lisbon – 2 November 1312, in Lisbon;[1] Portuguese pronunciation: [ɐˈfõsu]; English: Alphonzo or Alphonse) was a Portuguese infante (prince), the second son of King Afonso III of Portugal and his second wife Beatrice of Castile.

[2] He was titled Lord of Portalegre, Castelo de Vide, Arronches, Marvão[3] and Lourinhã.

Afonso was born on 8 February 1263 and in 1287 married Violante Manuel, daughter of Castilian Infante Manuel of Castile.

Afonso died on 2 November 1312 in Lisbon.

This biography of a member of the Portuguese royal family is a stub.