He was born circa 1710. His father was Asencio de Cuellar, and his mother was Ana Garcia.
He married Maria Inez Martinez, daughter of Miguel Martinez and Clara de Treviño.
Clara Maria de Cuellar, born 1738.
Jose Tomas de Cuellar, born 1740.
Jose Salvador de Cuellar, born 1742.
Rosalia de Cuellar, born 1744.
Jose Gregorio de Cuellar, born 1746.
Esmergilda de Cuellar, born 1748.
Ana Maria de Cuellar, born 1750. She married Miguel de Alegria.