Juan Jose de la Garza Montemayor was the son of Juan de la Garza and Maria Gertrudis Chapa.
He married Maria Josefa Lopez de Jaen.
In 1800 he purchased Camargo 13 from Bernardo Gomez. Sold by the heirs of the original grantee.
He owned Camargo 15 by purchase from Jose Benito Lopez de Jaen.
He owned Camargo 16 by purchase from Jose Francisco Lopez de Jaen. Sold by the heirs of the original grantee.