His father was Bernabe de las Casas, and his mother was Maria Beatriz Navarro Rodriguez.
He married Isabel de la Garza, daughter of Capt. Blas Maria de la Garza Falcon Treviño and Beatriz Gonzalez Hidalgo Navarro. It was her second marriage.
Juan de las Casas. He married Ana Martinez Guajardo, daughter of Ignacio Martinez Guajardo and Maria Isabel Flores de Valdez.