Mahaut de Porhoët, Viscountess of Porhoët, was born circa 1180 in Porhoët to Eudon III de Porhoët (c1165-1234) and Marguerite and died circa 1227 of unspecified causes. She married Geoffroi I de Fougères (c1180-1212) . Charlemagne (747-814)/s.
|Offspring of Mahaut de Porhoët and Geoffroi I de Fougères (c1180-1212)|
|Jeanne de Fougères (1201-)|
|Raoul III de Fougères (c1205-1257)||1205||24 February 1257||Isabelle de Craon (c1212-1275)|