Sibylle de Montfaucon was born circa 1230 to Thierry III de Montbéliard (1205-1283) and Alix de Ferrette (c1208-c1274) and died circa 1277 of unspecified causes. She married Rodolphe III de Neuchâtel (c1200-1263) .
Children
| Name | Birth | Death | Joined with |
| Ulrich IV de Neuchâtel (-1278) | |||
| Jean de Neuchâtel (-1308) | |||
| Amédée de Neuchâtel (c1250-1288) | 1250 | 1288 | Jordane de La Sarraz (c1255-c1302) |
| Richard de Neuchâtel (-1310) | |||
| Henri de Neuchâtel (-1283) | |||
| Agnelette de Neuchâtel (-1306) | |||
| Marguerite de Neuchâtel | |||
Footnotes (including sources)
| ‡ General |
| Ω Birth |
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| ¶ Death |
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