Hawise of Normandy
- 1034( = Descendancy chart to this point, = Expand, = Collapse)
- 1 Hawise of Normandy d. 21 Feb 1033/34
- Geoffrey, I Duke of Brittany b. Abt 980 d. 20 Nov 1008
- 2 Odo, Count of Penthièvre b. 999 d. 1079
- Agnes of Cornwall
- 3 Stephen, Count of Tréguier Lord of Richmond b. Abt 1058 d. 21 Apr 1136
- Agnes of Cornwall
- 2 Odo, Count of Penthièvre b. 999 d. 1079
- Geoffrey, I Duke of Brittany b. Abt 980 d. 20 Nov 1008