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Mahaut de Fiennes was born circa 1210 to William I de Fiennes (c1160-c1240) and Agnes de Dammartin (c1166-) and died after 1244 of unspecified causes. She married Baudouin III de Guînes (1198-1244) .
Children
Name | Birth | Death | Joined with |
Mathilde de Guînes (1226-1262) | |||
Arnould III de Guînes (c1225-c1283) | 1225 | 1283 | Alix de Coucy (c1235-c1282) |
Adelvis de Guînes | |||
Baudouin de Sangate (c1240-) | |||
Yde de Guînes |