Isabelle was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Geoffroy II de Clermont, who she married in ABT 1350. The place has not been found. Their two known children were Aynard III (c1365->1427) and Charles (?-1444).
Note 1
daughter of Guillaume de Montoison and Elizène de Pierregourd