- A well-to-do citizen of Lisbon to whom King Pedro entrusted the childhood of his son João, Master of Avis, and future king of Portugal.
- Lourenço Martins was known as 'da praça', because he lived close to the Praça dos Escanos (the square of the Benches or Settles) in Lisbon.
- "one of the upright citizens of that city [Lisbon]". [Pedro, ch.1: 62-63]
Lourenço Martĩiz da Praça