Juan Nuñez de Carvajal was the son of Alonso Rodriguez de Carbajal and Luisa Villarreal de las Casas.
He married Antonia de Ayala Benavides on 18 Aug 1675 in Monterrey.
He requested a dispensation to marry Leonor de la Garza in 1692. Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.36.