Robert III Beaumont de Neufbourg, Lord of Neufbourg, was born 1193 to Robert II de Neufbourg (c1170-c1217) and Marguerite de Gloucester and died 1243 of unspecified causes. He married Jeanne de Mauquenchy 1215 JL .
Children
| Name | Birth | Death | Joined with |
| Marguerite de Neufbourg (1223-1277) | 1223 | 1277 | Amaury II de Meulan (c1180-c1260) |
Residences
Footnotes (including sources)
| ‡ General |