Biography
Sibyl de Neufmarché was born circa 1096 to Bernard de Neufmarché (1070-1125) and Nest ferch Osbern (1079-1094) and died after 1143 of unspecified causes. She married Miles of Gloucester, 1st Earl of Hereford (-1143) 1121 JL .
Children
| Name | Birth | Death | Joined with |
| Margaret of Hereford (c1122-1197) | 1122 | 6 April 1197 | Humphrey de Bohun (c1100-c1164) |
| Roger Fitzmiles, 2nd Earl of Hereford (bef1125-1155) | |||
| Walter of Hereford (-c1159) | |||
| Bertha of Hereford (c1130-) | 1130 | William de Braose, 3rd Lord of Bramber (1112-c1192) | |
Footnotes (including sources)
| ‡ General |