• Born: Between 1112 and 1116, Anjou, France
• Married (1): 1123
• Married (2): 1134
• Died: 1165, Bethany

  Research Notes:

She is named by Orderic Vitalis, who also names her father and specifies that he arranged her (first) marriage as part of the support he gave to Guillaume de Normandie, on the suggestion of Amaury de Montfort, and that her dowry was the county of Maine. According to Orderic Vitalis, King Henry broke off the marriage "making use of threats and pleas and an enormous quantity of gold and silver". Both passages in Orderic Vitalis refer only to a betrothal, but a marriage must have taken place otherwise a papal annulment would have been unnecessary. Her father supported her husband against his uncle Henry I King of England, indignant that the latter retained the dowry of his other daughter Alice, married to King Henry's son who had been drowned in the Blanche Nef [White Ship] in 1120. Orderic Vitalis records Sibylle's second marriage, as does William of Tyre (who says she was her father's older daughter). The Cartulaire de Saint-Bertin records the marriage of "Sibillam comitis Andegavensis filiam" with Thierry after the death of his first wife. She left France with her second husband in Jun 1147 on the Second Crusade. She accompanied her husband to Palestine in 1157 but refused to return with him to Europe in 1158.

She became a nun at the convent of St Lazarus at Bethany. After the death of her stepmother Mélisende Queen of Jerusalem in 1161, Ctss Sibylle assumed a position of influence among the royal family of Jerusalem.

The Annales Aquicinctini record the death in 1165 of "Sibbilla comitissa Flandrie apud Sanctum Lazarum". ¹