His father was Lazaro de la Garza Falcon, and his mother was Petronila de Montemayor.
He married Maria Martinez, daughter of Capt. Joseph Ignacio Martinez and Maria Ines de la Garza de la Rocha.
Francisca Javiera de la Garza. In 1729, she requested a dispensation to marry Manuel de la Garza.
Joaquin Garza Montemayor. In 1726, he requested a dispensation to marry Maria Ignacia Gonzalez.
Miguel de la Garza. In 1727, he requested a dispensation to marry Manuela Flores.