| Male Robert I Count of Mortain Corbet, Earl of Cornwall |
| Birth | 1052 | Caux, Allier, Auvergne, France |
| Death | Jan 1122 | Alcester, Warwickshire, England |
| Burial | ||
| Marriage | ||
| Father | ||
| Mother | ||
| Female Sybil Sybilla Adela Corbet, Lady Alcester |
| Birth | 1077 | Alcester, Warwickshire, England |
| Death | 1157 | Blaen, Llyfni, Brecknockshire, Wales |
| Burial | ||
| Spouse | Herbert FitzHerbert | F416 | |
| Marriage | ||
| Spouse | Henry I Beauclerc, Duke of Normandy, King of England | F3685 | |
| Marriage | Abt 1090 | |