His father was Bartolome Montes de Oca, and his mother was Luisa de Ayala.
On 26 Dec 1681, he requested a dispensation to marry Juana de la Barrera in Monterrey due to 4th degree blood relation. Dispensation source: Guerra, et. al., Index to the Marriage Investigations of the Diocese of Guadalajara, vol.1 p.270.