Juan Perez de la Garza was the son of Pedro de la Garza Rodriguez and Maria Lucia Robles y de la Rocha.
He requested a dispensation to marry Maria Cantu in 1686. Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.49.
Isabel Perez de la Garza married Gabriel Cavazos.
Juana Maria de la Garza married Lucas de la Garza.
Joseph Francisco de la Garza Perez married Clara Guerra.
Maria Catarina de la Garza married Francisco de Villarreal.
Tomasina de la Garza married Andres de Villarreal.