Agnès was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Guy I de la Roche-sur-Ognon. They were married, but the date and place have not been found. Their six known children were Jean (?-1280), Guillaume (?-1287), Alice (?->1277), Isabelle (?-?), Catherine (?-?) and Marguerite (c1230-c1291).