Nielsen Hayden genealogy
Thomas de Clare
1248 - 1287 (~ 44 years)(
= Descendancy chart to this point, 
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- 1 Thomas de Clare [1] b. Between 1243 and 1248 d. 29 Aug 1287
- Juliane fitz Maurice d. Bef 24 Sep 1300
- 2 Maud de Clare [1.1] d. 1 Feb 1325
- Robert de Clifford b. Abt 1 Apr 1274 d. 24 Jun 1314
- 3 Idoine de Clifford [1.1.1] d. 24 Aug 1365
- Henry de Percy b. 1299 d. 26 Feb 1352
- 4 Isabel Percy [1.1.1.1] d. Between 13 Sep 1349 and 25 May 1368
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- 4 Eleanor de Percy [1.1.1.2] d. Bef 18 Oct 1361
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- 4 Henry de Percy [1.1.1.3] b. Between 1322 and 1325 d. Abt 18 May 1368
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- 4 Maud Percy [1.1.1.4] b. Abt 1345 d. Bef 18 Feb 1379
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- 4 Isabel Percy [1.1.1.1]
- 3 Margaret de Clifford [1.1.2] d. 8 Aug 1382
- Peter de Mauley b. Abt 1300 d. 18 Jan 1355
- 4 Peter de Mauley [1.1.2.1] b. Abt 1331 d. 19 Mar 1383
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- 4 Peter de Mauley [1.1.2.1]
- 3 Robert de Clifford [1.1.3] b. 5 Nov 1305 d. 20 May 1344
- Isabel de Berkeley d. 25 Jul 1362
- 4 Roger de Clifford [1.1.3.1] b. 10 Jul 1333 d. 13 Jul 1389
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- 4 Roger de Clifford [1.1.3.1]
- 3 Idoine de Clifford [1.1.1]
- 2 Margaret de Clare [1.2] b. Between 1286 and 1287 d. 1333
- + Gilbert de Umfreville d. Bef 23 May 1303
- Bartholomew de Badlesmere b. Abt 1275 d. 12 Apr 1322
- 3 Margery de Badlesmere [1.2.1] b. Abt 1306 d. 18 Oct 1363
- William IV de Ros b. Abt 1288 d. 3 Feb 1343
- 4 Elizabeth de Roos [1.2.1.1] d. 24 May 1380
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- 4 Maud de Ros [1.2.1.2] b. Abt 1331 d. 9 Dec 1388
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- 4 Thomas de Ros [1.2.1.3] b. 13 Jan 1337 d. 8 Jun 1384
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- 4 Elizabeth de Roos [1.2.1.1]
- 3 Maud de Badlesmere [1.2.2] b. Abt 1308 d. 24 May 1366
- John de Vere b. Abt 12 Mar 1312 d. 23 Jan 1360
- 4 Margaret de Vere [1.2.2.1] d. 15 Jun 1398
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- 4 Aubrey Vere [1.2.2.2] b. Between 1338 and 1340 d. 23 Apr 1400
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- 4 Margaret de Vere [1.2.2.1]
- 3 Elizabeth de Badlesmere [1.2.3] b. Abt 1313 d. 8 Jun 1356
- Edmund de Mortimer b. Between 1305 and 1306 d. Bef 21 Jan 1332
- 4 Roger de Mortimer [1.2.3.1] b. 11 Nov 1328 d. 26 Feb 1360
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- 4 Roger de Mortimer [1.2.3.1]
- William de Bohun b. 1313 d. 16 Sep 1360
- 4 Humphrey de Bohun [1.2.3.2] b. 25 Mar 1342 d. 16 Jan 1372
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- 4 Elizabeth de Bohun [1.2.3.3] b. Abt 1350 d. 3 Apr 1385
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- 4 Humphrey de Bohun [1.2.3.2]
- 3 Margaret de Badlesmere [1.2.4] b. 3 Dec 1314 d. Between 1344 and 1347
- John de Tibetot b. 20 Jul 1313 d. 13 Apr 1367
- 4 Robert Tibetot [1.2.4.1] b. Bef 11 Jun 1341 d. 13 Apr 1372
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- 4 Robert Tibetot [1.2.4.1]
- 3 Margery de Badlesmere [1.2.1]
- + Gilbert de Umfreville d. Bef 23 May 1303
- 2 Maud de Clare [1.1]