His father was Sgt. Major Juan de la Garza Falcon, and his mother was Maria Margarita Rodriguez de Montemayor.
He married Margarita Lopez Prieto, daughter of Nicolas Lopez Prieto and Maria de Ayala.
In 1701, he requested a dispensation to marry Angela Mendez Tovar. It was his second marriage, and her second marriage. Dispensation source: Guerra, et. al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.273.
Blas de la Garza. In 1712, he requested a dispensation to marry Maria Magdalena Garcia.
Nicolasa de la Garza Falcon. She married Antonio Garcia Guerra, son of Pedro Garcia de Sosa and Elena Guerra.
Buenaventura Cayetano de la Garza. In 1732, he requested a dispensation to marry Maria Teresa Caballero.
Ramona de la Garza. She married Melchor Sanchez de la Barrera.
Angela de la Garza. In 1749, she requested a dispensation to marry Sebastian Gonzalez de Apodoca.
Josefa de la Garza. She married Anastacio de Guzman.
Margarita de la Garza. She married Alonso Rodriguez.