Sibylle de Montfaucon
Sibylle de Montfaucon, also called Sibylle de Montbéliard, was the daughter of Count Theodoric III of Montbéliard and Alix of Ferrette. She married Rodolphe III, lord of Neuchâtel, and as dame de Neuchâtel bore his successors Ulrich IV, Henry and Amadeus. She died in 1277.