Hildebrande was the daughter of Pons du Mezenc but her mother is unknown. The date and place of her birth have not been found.
Her husband was Ursus-Adhémad de Chapteuil. They were married, but the date and place have not been found. Their three known children were Sylvius (?-c0725), Ursus (?-?) and Adon (?-?).