- Vassal of King Pedro of Portugal and later of King Fernando.
- Accompanied Gil Fernandes de Carvalho, the Master of Santiago in Portugal, as well as Martim Vasques de Góis, Gonçalo Mendes de Vasconcelos, Álvaro Gonçalves de Moura, Nuno Viegas the Elder, and Rui Vasques Ribeira to assist Pedro of Castile in the siege of Tarazona. They were sent by King Pedro of Portugal, Pedro of Castile's uncle. [Pedro, ch. 34: 39-46]
- At the tournament celebrating the peace treaty of Sanatarém (1373) and the marriage of Princess Beatriz of Portugal to Sancho Alfonso, brother of Enrique II of Castile, Martim Afonso de Melo crashed against the groom so heavily that he threw him and his mount to the ground.
Martim Affonsode Mello
Martim Affonsso de Melloo