Duke of Alencon Guillaume Talvas, I
- 1028(
= Descendancy chart to this point, 
= Expand, 
= Collapse)
- 1 Duke of Alencon Guillaume Talvas, I [1] d. 1028
-
- 2 Duke of Alencon Guillaume Talvas, II [1.1] b. 995 d. 1048
- Hildeburge Beaumont b. 995 d. Yes, date unknown
- 3 Mabel Talvas [1.1.1] d. 2 Dec 1079
- Earl of Shrewsbury Roger Montgomery b. 1005 d. 27 Jul 1094
- 4 Sibyl Montgomery [1.1.1.1]
[ =>]
- 4 Maude Montgomery [1.1.1.2] b. 1041 d. 1107
[ =>]
- 4 Earl of Shrewsbury Robert Talvas de belleme [1.1.1.3] b. 1054 d. 8 May 1131
[ =>]
- 4 Roger Montgomery [1.1.1.4] b. 1058 d. 1102
[ =>]
- 4 Sibyl Montgomery [1.1.1.1]
- 3 Mabel Talvas [1.1.1]
- 2 Duke of Alencon Guillaume Talvas, II [1.1]