She was born circa 1750. Her father was Tomas de Cuellar, and her mother was Maria Inez Martinez. In 1782, she lived in Mier in household number 14. The church census recorded that she was married, española, and 28 years old. Her household included 4 people, one of whom was likely a servant.
She married Miguel de Alegria. He owned Porción 6, Revilla.