Sibylle was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Bohémond III de Poitiers, who she married in 1180. The place has not been found. Their two known children were Alix (?-?) and Guillaume (?-?).
| Association | Relationship |
|---|---|
| Zabel I d'Arménie (queen of Armenia) | nièce |