Joseph Valentin de la Garza was the son of Salvador de la Garza and Juana Gutierrez de Castro.
He married Beatriz de Elizondo.
He requested a dispensation to marry Juana de Escamilla in 1735. Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.94.
He requested a dispensation to marry Margarita Gonzalez in 1714. Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.56.
Joseph Joaquin de la Garza married Josepha Gertrudis Cantu.