Nielsen Hayden genealogy
Gwenllian ferch Rhys ap Llywelyn Eurdorchog
1. Gwenllian ferch Rhys ap Llywelyn Eurdorchog Family/Spouse: Ithel ab Einudd ap Morien ap Morgeneu. Ithel (son of Einudd ap Morien ap Morgeneu ab Elystan ap Gwaithfoed) was born about 1100. [Group Sheet] [Family Chart]
Children:
Generation: 2
2. Jonet ferch Ithel ab Einudd 
(1.Gwenllian1)Family/Spouse: Maredudd ab Uchtrud ab Edwin ap Gronwy. Maredudd (son of Uchdrud ab Edwin ap Gronwy) was born about 1100. [Group Sheet] [Family Chart]
Children:
- 3. Hen Ithel Gam ap Maredudd ab Uchtrud ab Edwin was born about 1130.
- 3. Hen Ithel Gam ap Maredudd ab Uchtrud ab Edwin
Generation: 3
3. Hen Ithel Gam ap Maredudd ab Uchtrud ab Edwin (2.Jonet2, 1.Gwenllian1) was born about 1130. Family/Spouse: Unknown. [Group Sheet] [Family Chart]
Children:
- 4. Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchtrud died after 1237.
- 4. Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchtrud
Generation: 4
4. Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchtrud (3.Hen3, 2.Jonet2, 1.Gwenllian1) died after 1237. Family/Spouse: Tibod ferch Rhirid ab Iorwerth ap Madog ap Ednywain Bendew II. [Group Sheet] [Family Chart]
Children:
- 5. Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd was born about 1230.
- 5. Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd
Generation: 5
5. Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd (4.Ithel4, 3.Hen3, 2.Jonet2, 1.Gwenllian1) was born about 1230. Family/Spouse: Adles ferch Richard ap Cadwaladr ap Gruffudd ap Cynan. [Group Sheet] [Family Chart]
Children:
- 6. Angharad ferch Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchdrud ab Edwin was born in of Tegeingl, Wales.
- 6. Angharad ferch Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchdrud ab Edwin
Generation: 6
6. Angharad ferch Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchdrud ab Edwin (5.Ithel5, 4.Ithel4, 3.Hen3, 2.Jonet2, 1.Gwenllian1) was born in of Tegeingl, Wales. Family/Spouse: Tudur ap Gronwy ab Ednyfed Fychan ap Cynwrig. Tudur (son of Gronwy ab Ednyfed Fychan ap Cynwrig ab Iorwerth and Morfudd ferch Meurig) died in 1311. [Group Sheet] [Family Chart]
Children:
- 7. Gronwy ap Tydyr Hên ap Gronwy was born in of Penmynydd, Anglesey, Wales; died in 1331; was buried in Bangor, Gwynedd, Wales.
- 7. Gronwy ap Tydyr Hên ap Gronwy
Generation: 7
7. Gronwy ap Tydyr Hên ap Gronwy (6.Angharad6, 5.Ithel5, 4.Ithel4, 3.Hen3, 2.Jonet2, 1.Gwenllian1) was born in of Penmynydd, Anglesey, Wales; died in 1331; was buried in Bangor, Gwynedd, Wales. Family/Spouse: Gwerfyl ferch Madog. Gwerfyl (daughter of Madog ab Iorwerth ap Madog ap Gruffudd and Efa ferch Llywelyn ap Gruffudd) was born in of Hendwr in Edeirnion, Merionethshire, Wales; died after 1293. [Group Sheet] [Family Chart]
Children:
- 8. Tudur ap Gronwy died in 1367 in Trecasteil, Anglesey, Wales.
- 8. Tudur ap Gronwy
Generation: 8
8. Tudur ap Gronwy (7.Gronwy7, 6.Angharad6, 5.Ithel5, 4.Ithel4, 3.Hen3, 2.Jonet2, 1.Gwenllian1) died in 1367 in Trecasteil, Anglesey, Wales. Family/Spouse: Margred ferch Thomas. Margred (daughter of Thomas ap Llewellyn ab Owain ap Maredudd and Elinor ferch Maredudd) was born in of Iscoed, Ceredigion, Wales. [Group Sheet] [Family Chart]
Children:
- 9. Maredudd ap Tudur died after 1406.
- 9. Maredudd ap Tudur