Nielsen Hayden genealogy
Descendants of Isabel de Courtenay
- Aft 1333Father: Hugh de Courtenay (25 Mar 1251 of Okehampton, Devon, England - 28 Feb 1292 Colecombe, Devon, England)
Mother: Eleanor le Despenser ( - 30 Sep 1328 London, England)
Isabel de Courtenay ( - Aft 12 Feb 1333)
John de St. John (Between 1272 and 1274 of Basing, Hampshire, England - Bef 4 Apr 1329)
   ├─ Margaret de St. John ( - 19 Nov 1361)
   │ John de Beauchamp (Abt 1306 of Hatch Beauchamp, Taunton, Somerset, England - 19 May 1343)
   │    └─ Cecily de Beauchamp (Between 1321 and 1331 - 7 Jun 1394)
   │     Roger de Seymour (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) =>
   │         + Margery de Brockbury
   └─ Hugh de St. John (26 May 1310 of Basing, Hampshire, England - Bef 25 Oct 1335)
    Mirabel Wake ( - Aft Jun 1355)(m. Bef 16 Sep 1329)
       └─ Isabel de St. John (Abt 1333 - 16 Oct 1393)
        Luke de Poynings (of Basing, Hampshire, England -
        Between 5 Jun 1376 and 4 Jul 1376 bur.Warnford, Hampshire, England)(m. Bef 29 Jan 1349)
        Between 5 Jun 1376 and 4 Jul 1376 bur.Warnford, Hampshire, England)(m. Bef 29 Jan 1349)
           │ + Henry de Ferrers (16 Feb 1356 Tilty Abbey, Essex, England - 3 Feb 1388)
           └─ Thomas Poynings (of Basing, Hampshire, England - 7 Mar 1429) =>
            + Joan le Strange ( - Aft 16 Oct 1390)(m. Bef 1376)