Mathilde van Namen was born circa 1120 to Henri de Namur (c1070-1138) and Mathilde van Limburg (c1090-aft1148) and died circa 1170 of unspecified causes. She married Thierry de Walcourt .
Children
| Name | Birth | Death | Joined with |
| Wery de Walcourt | |||
| Fille de Walcourt | |||
| Autres Filles de Walcourt | |||
| Name | Birth | Death | Joined with |
| Jacques d'Avesnes (c1150-1191) | 1152 | 7 September 1191 | Adeline de Guise (aft1150-c1191) |
| Ide d'Avesnes | |||
| Fastre d'Avesnes | |||
| Fille d'Avesnes | |||
| Radulph d'Avesnes | |||
Footnotes (including sources)
| ‡ General |