James Harcourt
- 1154(
= Descendancy chart to this point, 
= Expand, 
= Collapse)
- 1 James Harcourt [1] d. 1154
- Aveline
- 2 Maud Harcourt [1.1] b. 1195 d. Yes, date unknown
- Earl of Hertford Roger De Clare b. 1115 d. 1173
- 3 Aveline De Clare [1.1.1] d. 4 Jun 1225
- Earl of Essex Geoffrey Fitzpiers d. 14 Oct 1213
- 4 Sir John Fitzgeoffrey, of Essex [1.1.1.1] d. 23 Nov 1258
[ =>]
- 4 Sir John Fitzgeoffrey, of Essex [1.1.1.1]
- 3 Earl of Hertford Richard De Clare [1.1.2] b. 1153 d. 1217
- Countess of Gloucester Amicia d. 1225
- 4 Earl of Gloucester Gilbert De Clare [1.1.2.1] b. 1180 d. 25 Oct 1230
[ =>]
- 4 Earl of Gloucester Gilbert De Clare [1.1.2.1]
- 3 Aveline De Clare [1.1.1]
- 2 Maud Harcourt [1.1]