Nielsen Hayden genealogy
Ancestors of William de Seymour
- 1391
┌── Roger de Seymour 
(of Undy, Monmouthshire, Wales - Between 1359 and 29 Jan 1366)(m. Aft Aug 1347)
(of Undy, Monmouthshire, Wales - Between 1359 and 29 Jan 1366)(m. Aft Aug 1347) William de Seymour (of Hatch Beauchamp, Taunton, Somerset, England - 25 Aug 1391)
│ ┌── Robert V de Beauchamp (Bef 1224 of Hatch Beauchamp, Taunton, Somerset, England -
│ │ Bef 25 Oct 1263)(m. Bef 16 Dec 1246) =>
(Bef 1224 of Hatch Beauchamp, Taunton, Somerset, England -│ │ Bef 25 Oct 1263)(m. Bef 16 Dec 1246) =>
│ ┌── John de Beauchamp (Bef 1247 - 24 Oct 1283 Hatch Beauchamp, Taunton, Somerset, England)
(Bef 1247 - 24 Oct 1283 Hatch Beauchamp, Taunton, Somerset, England) │ │ └── Alice de Mohun (of Dunster, Williton, Somerset, England - Aft 1265)
(of Dunster, Williton, Somerset, England - Aft 1265) │ │ (m. Bef 16 Dec 1246) =>
│ │
│ ┌── John de Beauchamp (25 Jul 1274 of Hatch Beauchamp, Taunton, Somerset, England -
│ │ Aft 20 Oct 1336)(m. Bef 1302)
(25 Jul 1274 of Hatch Beauchamp, Taunton, Somerset, England -│ │ Aft 20 Oct 1336)(m. Bef 1302)
│ │ │
│ │ │ ┌── William de Forz (of Chewton, Somerset, England - Bef 22 May 1259)
(of Chewton, Somerset, England - Bef 22 May 1259) │ │ │ │ (m. Abt 30 Jul 1248) =>
│ │ └── Cecily de Vivonne (Abt 1257 Chewton, Somerset, England -
│ │ 10 Jan 1320 Stoke-under-Hamden, Somerset, England)
(Abt 1257 Chewton, Somerset, England -│ │ 10 Jan 1320 Stoke-under-Hamden, Somerset, England)
│ │ └── Maud de Ferrers (Abt 1230 - 12 Mar 1299)(m. Abt 30 Jul 1248) =>
(Abt 1230 - 12 Mar 1299)(m. Abt 30 Jul 1248) => │ │
│ ┌── John de Beauchamp (Abt 1306 of Hatch Beauchamp, Taunton, Somerset, England - 19 May 1343)
(Abt 1306 of Hatch Beauchamp, Taunton, Somerset, England - 19 May 1343) │ │ └── Joan ( - 9 Feb 1327)(m. Bef 1302)
( - 9 Feb 1327)(m. Bef 1302) │ │
└── Cecily de Beauchamp (Between 1321 and 1331 - 7 Jun 1394)(m. Aft Aug 1347)
(Between 1321 and 1331 - 7 Jun 1394)(m. Aft Aug 1347) │
│ ┌── Robert de St. John (of Basing, Hampshire, England - Bef 25 Mar 1267) =>
(of Basing, Hampshire, England - Bef 25 Mar 1267) => │ ┌── John de St. John (of Basing, Hampshire, England - Between 20 Sep 1302 and 29 Sep 1302)
(of Basing, Hampshire, England - Between 20 Sep 1302 and 29 Sep 1302) │ │ (m. Bef 29 Jun 1256)
│ │ └── Agnes de Cantelowe ( - Aft 1279) =>
( - Aft 1279) => │ │
│ ┌── John de St. John (Between 1272 and 1274 of Basing, Hampshire, England - Bef 4 Apr 1329)
(Between 1272 and 1274 of Basing, Hampshire, England - Bef 4 Apr 1329) │ │ │
│ │ │ ┌── Reynold fitz Peter (of Blaen Llyfni, Cathedine, Brecconshire, Wales - 4 May 1286)
(of Blaen Llyfni, Cathedine, Brecconshire, Wales - 4 May 1286) │ │ │ │ (m. Bef Sep 1249) =>
│ │ └── Agnes Fitz Reynold ( - Aft 1305)(m. Bef 29 Jun 1256)
( - Aft 1305)(m. Bef 29 Jun 1256) │ │ └── Alice de Stanford ( - Aft 24 Oct 1265)(m. Bef Sep 1249)
( - Aft 24 Oct 1265)(m. Bef Sep 1249) │ │
└── Margaret de St. John ( - 19 Nov 1361)
( - 19 Nov 1361) │
│ ┌── John de Courtenay (of Okehampton, Devon, England -
│ │ 3 May 1274 bur.Ford Abbey, Dorset, England)(m. Aft 6 Oct 1240) =>
(of Okehampton, Devon, England -│ │ 3 May 1274 bur.Ford Abbey, Dorset, England)(m. Aft 6 Oct 1240) =>
│ ┌── Hugh de Courtenay (25 Mar 1251 of Okehampton, Devon, England -
│ │ 28 Feb 1292 Colecombe, Devon, England)
(25 Mar 1251 of Okehampton, Devon, England -│ │ 28 Feb 1292 Colecombe, Devon, England)
│ │ └── Isabel de Vere ( - Bef 7 Jan 1291 bur.Cowick Priory, Exeter, Devon, England)
( - Bef 7 Jan 1291 bur.Cowick Priory, Exeter, Devon, England) │ │ (m. Aft 6 Oct 1240) =>
│ │
└── Isabel de Courtenay ( - Aft 12 Feb 1333)
( - Aft 12 Feb 1333) │
│ ┌── Hugh le Despenser (Abt 1223 - 4 Aug 1265 Evesham, Worcestershire, England)
(Abt 1223 - 4 Aug 1265 Evesham, Worcestershire, England) │ │ (m. Bef 1261) =>
└── Eleanor le Despenser ( - 30 Sep 1328 London, England)
( - 30 Sep 1328 London, England) └── Aline Basset (Abt 1240 of Wycombe, Buckinghamshire, England - Bef 11 Apr 1281)
(Abt 1240 of Wycombe, Buckinghamshire, England - Bef 11 Apr 1281) (m. Bef 1261) =>