William De Grenville
- Yes, date unknown
Generation: 1
Generation: 3
Generation: 4
1. William De Grenville (son of Richard Fitzhamon De Granville and Isabel (of Buckingham) Giffard); and died.
2. Richard Fitzhamon De Granville (son of Hamon (Dentatus) Count of Corbeil and Halwise Or Elizabeth D'avoye); and died. Richard + Isabel (of Buckingham) Giffard. Isabel (daughter of Walter (1st Earl of Buckingham) Giffard and Agnes) and died. [Group Sheet] [Family Chart]
3. Isabel (of Buckingham) Giffard (daughter of Walter (1st Earl of Buckingham) Giffard and Agnes); and died. Children:
- Richard (of Bideford) De Granville died in 1147.
- 1. William De Grenville and died.
- Gerard De Grenville died in Dsp.
- Robert De Grenville and died.
Generation: 3
4. Hamon (Dentatus) Count of Corbeil (son of Hamon Count of Corbeil); and died. Hamon + Halwise Or Elizabeth D'avoye. Halwise (daughter of Henri L'oiseteur) and died. [Group Sheet] [Family Chart]
5. Halwise Or Elizabeth D'avoye (daughter of Henri L'oiseteur); and died. Children:
- Robert (Lord of Glamorgan) Fitzhamon died in Mar 1106-1107.
- 2. Richard Fitzhamon De Granville and died.
6. Walter (1st Earl of Buckingham) Giffard (son of Walter Giffard); died in 1102. Walter + Agnes. and died. [Group Sheet] [Family Chart]
7. Agnes and died. Children:
- Walter (2nd Earl of Buckingham) Giffard died in 1164.
- 3. Isabel (of Buckingham) Giffard and died.
Generation: 4
8. Hamon Count of Corbeil (son of Mauger Count of Mortain & Corbuel and Germaine of Corbeil); died in Killed. Children:
- 4. Hamon (Dentatus) Count of Corbeil and died.
10. Henri L'oiseteur and died. Children:
- 5. Halwise Or Elizabeth D'avoye and died.
12. Walter Giffard (son of Osbern De Bolbec and Aveline (Or Wevia) De Crepon); and died. Children:
- Rohese Giffard and died.
- 6. Walter (1st Earl of Buckingham) Giffard died in 1102.