Margaret de Braose was born 1177 to William de Braose, 7th Baron Abergavenny (c1153-1211) and Matilda de Saint-Valery (c1155-1210) and died after 1255 of unspecified causes. She married Walter de Lacy (c1172-1241) .
Children
| Name | Birth | Death | Joined with |
| Pernelle de Lacy (c1201-aft1287) | 1201 | 1287 | Raoul VI de Tosny (c1189-c1239) |
| Gilbert de Lacy (?-1234) | 25 December 1230 | Isabel Bigod (1212-1252) | |
| Egidia de Lacy (c1205-?) | 1205 | Richard Mor de Burgh (c1194-1242) | |
Footnotes (including sources)
| ‡ General |