His father was Juan Gomez de Castro, and his mother was Clara Sanchez de Zamora.
He married Ana Maria Garcia, daughter of Joseph Garcia and Josefa Peñalosa.
In 1748, he requested a dispensation to marry Maria de la Garza. It was his second marriage. Dispensation source: Guerra, et. al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.124.