He was born circa 1746 in Salinas. His father was Juan de las Casas, and his mother was Josefa de la Garza. His father owned Porción 29, Camargo, Porción 39, Camargo. In 1782, he lived in San Juan Bautista del Cojo in household number 130. The church census recorded that he was married, casta, and 33 years old. His household included 4 people. He owned Porción 39, Camargo.
He married Maria Rosalia Olivares, daughter of Jose Valentin de Olivares and Maria de Jesus Guajardo. Her father owned Porción 19, Mier.
Maria Leonarda Casas, born 1774.
Maria Josefa Casas, born 1778.
Porción 39, Camargo