Isidro de la Garza was the son of Lazaro de la Garza Falcon and Petronila de Montemayor.
He requested a dispensation to marry Antonia Cantu in 1693. Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.38.
Maria Josefa de la Garza married Juan de la Garza.
Joseph de la Garza married Nicolasa Cantu, Maria Rosa de Villarreal.
Lugarda de la Garza married Joseph Cantu.