| Male William III of Ponthieu, Seigneur de Montgomery in Normandy and Count of Ponthieu |
| Birth | 1093 | |
| Death | 1172 | |
| Burial | ||
| Marriage | ||
| Father | Robert of Bellême, seigneur de Bellême (or Belèsme), seigneur de Montgomery, viscount of the Hiémois, 3rd Earl of Shrewsbury and Count of Ponthieu | F4244 Group Sheet | |
| Mother | ||