 He was the son of Don Basque Seixas ""el viejo"" and Maria Alvarez de Sotomayor and grandson of Don Vasco Seixas, who in the fourteenth century was lord of San Paio, Osera, Chantada, Ferreira, Samos, Sobrado and Eire.He participated in the dynastic struggle of Trastámara in favor of Don Henry.In Friol there are many popular legends related to the fortress of San Paio of Narla and its owners Vazquez de Seixas.