- Castilian Doctor in canon and civil law.
- Juan I of Castile sent him, Juan Serrano, Prior of Guadalupe, and the knight Diego López de Medrano with his reply to the Duke of Lancaster when the latter arrived in Galicia and sent the king a message claiming the crown of Castile for his wife and himself (1386).
- Bibl: M. D. J. M., Historia Del Reinado de D. Pedro Primero de Castilla (Sevilla: Cários Santigosa, 1847), p. 182.
Aluaro Martjnz de Villarreal
Chronicle entries in which Álvaro Martínez de Villarreal appears:
Crónica de D. João I, part 2, ch. 84