He was born circa 1710. His father was Miguel Rodriguez de Montemayor, and his mother was Luisa Garcia de Quintanilla.
He married Josefa de Moya on 28 Jan 1732 in Monterrey. He was 22 years old.
Maria Guadalupe Rodriguez de Montemayor, born 1736. She married Jose Eusebio Leonardo Caballero de los Olivos, son of Lucas Caballero de los Olivos and Maria Teodora Ballesteros on 25 Feb 1754 in Guajuco.