Nielsen Hayden genealogy
William fitz Robert
- 1183(
= Descendancy chart to this point, 
= Expand, 
= Collapse)
- 1 William fitz Robert [1] d. 23 Nov 1183
- Hawise of Leicester d. 24 Apr 1197
- 2 Isabel of Gloucester [1.1] d. 14 Oct 1217
- + John, King of England b. Abt 27 Dec 1166 d. 19 Oct 1216
- + Hubert de Burgh b. Abt 1170 d. 1243
- + John, King of England b. Abt 27 Dec 1166 d. 19 Oct 1216
- 2 Amice of Gloucester [1.2] d. 1 Jan 1225
- Richard de Clare b. Abt 1153 d. Between 30 Oct 1217 and 28 Nov 1217
- 3 Maud de Clare [1.2.1] d. 1213
- Roger de Lacy b. Abt 1165 d. 1 Oct 1211
- 4 (Unknown daughter of Roger de Lacy) [1.2.1.1]
[ =>]
- 4 John de Lacy [1.2.1.2] b. Abt 1192 d. 22 Jul 1240
[ =>]
- 4 (Unknown daughter of Roger de Lacy) [1.2.1.1]
- William de Briouze d. 1210
- 4 Maud de Briouze [1.2.1.3]
[ =>]
- 4 John de Brewes [1.2.1.4] b. Abt 1197 d. Between 1231 and 1232
[ =>]
- 4 Maud de Briouze [1.2.1.3]
- 3 Hawise de Clare [1.2.2] d. Aft 1234
- Geoffrey de Say b. Abt 1180 d. 19 Aug 1230
- 4 William de Say [1.2.2.1] d. Bef 12 Feb 1272
[ =>]
- 4 William de Say [1.2.2.1]
- 3 Gilbert de Clare [1.2.3] b. Abt 1180 d. 25 Oct 1230
- Isabel Marshal b. 9 Oct 1200 d. 17 Jan 1240
- 4 Amice de Clare [1.2.3.1] b. 27 May 1220 d. Bef 21 Jan 1284
[ =>]
- 4 Richard de Clare [1.2.3.2] b. 4 Aug 1222 d. Jul 1262
[ =>]
- 4 Isabel de Clare [1.2.3.3] b. 2 Nov 1226 d. Aft 10 Jul 1264
[ =>]
- 4 Amice de Clare [1.2.3.1]
- 3 Maud de Clare [1.2.1]
- 2 Isabel of Gloucester [1.1]