Mahaut Preuilly de Vendôme was born 1132 in Vendôme to Jean I de Vendôme (1110-1182) and Berthe du Puy-du-Fou (1105-1132) and died 1214 of unspecified causes. She married Henri I d'Avagour (c1110-1183) 19 September 1151 JL in Mayenne.
Children
| Name | Birth | Death | Joined with |
| Alain I d'Avaugour (c1253-1212) | 1153 | 29 December 1212 | Pétronille de Beaumont-au-Maine (c1180-) Adélaide de l'Aigle (1180-1216) |
| Geslin d'Avaugour (-aft1239) | |||
| Conan d'Avaugour (-c1208) | |||
| Alix d'Avaugour | |||
| Mathilde d'Avaugour | |||
Footnotes (including sources)
| ‡ General |