[1] His father was Martim Domingues, who was a squire, after being a widow, he became canon of the See of Lamego, Prior of the Collegiate of Santa Maria de Almacave in Lamego and rector of Santa Maria de Soutelo in São João da Pesqueira and his mother was Maria Esteves de Alvelos.
He was rector of the church of São Jacobi in Beja when, on 28 April 1317, his uncle D. Geraldo Domingues, who was Bishop of Évora, established him as the morgado of Medelo in Almacave near Lamegu, where was the 1st Senior, with his chapel of Saint Catherine in the See of Lamego, with his head in the Quintã of Medelo and linked him with several properties distributed by almost the whole country.
He stipulated that Vasco Martins should succeed his other nephew Egas, son of his brother Vicente Domingues.
King Dennis (or Denis) I gave D. Geraldo bishop of Porto, Medelo and his estates, in the term of Lamego (3.53 v), along with many other donations that made him.
From D. Vasco Martins, there was a seal from 1330 where, in addition to his religious emblematics, two shields were shown, each of which has two waves, which were not the weapons that the Alvelos used, but those of Medelo, his manhood.