Sybille de Hainaut was born 1179 to Baudouin V de Hainaut (1150-1195) and Margaret I of Flanders (c1143-1194) and died 1217 Paris of unspecified causes. She married Guichard IV "le Grand" de Beaujeu (-1216) 1197 JL .
Children
| Name | Birth | Death | Joined with |
| Humbert V de Beaujeu (1198-1250) | 1198 | 1 August 1250 Terre sainte, Syria | Marguerite de Baugé (1200-1252) |
| Guichard de Beaujeu (1201-1256) | 1201 | 1256 | Catherine d'Auvergne (1210-c1257) |
| Henri de Beaujeu (-bef1264) | |||
| Louis de Beaujeu (c1199-) | |||
| Agnes de Beaujeu (1200-1231) | 1200 | 1231 | Teobaldo I de Navarra (1201-1253) |
| Marguerite de Beaujeu (c1199-) | |||
| Philippa de Beaujeu (c1199-) | |||
| Sibylle de Beaujeu (bef1216-1265) | |||
Footnotes (including sources)
| ‡ General |
| ¢ Children |
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