| Person | Spouse | Relationship | Most recent common ancestor(s) |
|---|---|---|---|
| John Plantagenet | Isabel of Gloucester | Henry I of Normandy | |
| Geoffrey de Mandeville | Half 6th cousins twice removed |
Richard Ier de Normandie |
| Person | Spouse | Relationship | Most recent common ancestor(s) |
|---|---|---|---|
| John Plantagenet | Isabel of Gloucester | Henry I of Normandy | |
| Geoffrey de Mandeville | Half 6th cousins twice removed |
Richard Ier de Normandie |