Santiago de la Garza was born circa 1750, the son of Francisco de la Garza and Maria Candida Garcia Sepulveda.
He married Maria Juliana Rodriguez on 31 Aug 1775 in Mier.
Jose Luis de la Garza married Ana Maria Chapa. He owned Camargo 20.
In 1767 he was granted Camargo 110 by the King of Spain.