Guillaume le Meschin de Briquessart was born 1085 in Skipton-in-Craven to Ranulphe II de Briquessart (1052-1129) and Marguerite of Avranches (1054-c1101) and died 1138 of unspecified causes. He married Cécile de Romilly 1120 JL .
Children
| Name | Birth | Death | Joined with |
| Maud de Briquessart (1126-1191) | 1126 | 1191 | Philippe de Belmeis Hugues II de Mortimer |
| Avicie de Briquessart (1120-) | |||
Footnotes (including sources)
| ‡ General |