His father was Sgt. Major Francisco de la Garza Falcon, and his mother was Leonor Sepulveda Renteria.
In 1691, he requested a dispensation to marry Maria Gonzalez de Quintanilla. Dispensation source: Guerra, et. al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.139.
He married Maria de Ayala, daughter of Diego de Ayala and Nicolasa Garcia Davila. It was his second marriage.