Blas de la Garza Falcon was the son of Sgt. Major Juan de la Garza Falcon and Maria Margarita Rodriguez de Montemayor .
He married Margarita Lopez Prieto.
He requested a dispensation to marry Angela Mendez Tovar in 1701. Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.273.
Blas de la Garza married Maria Magdalena Garcia.
Ramona de la Garza married Melchor Sanchez de la Barrera.
Angela de la Garza married Sebastian Gonzalez de Apodoca.
Josefa de la Garza married Anastacio de Guzman.
Margarita de la Garza married Alonso Rodriguez.