Nielsen Hayden genealogy
Cadell ab Einion ab Owain ap Hywel Dda

( = Descendancy chart to this point,
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- 1 Cadell ab Einion ab Owain ap Hywel Dda [1] b. Abt 970
Elinor ferch Gwerystan
- 2 Tewdwr Mawr ap Cadell ab Einion ab Owain [1.1]
b. Abt 1000
- 3 Rhys ap Tewdyr, King of Deheubarth [1.1.1]
d. Apr 1093
Gwladus ferch Rhiwallon
- 4 Nest ferch Rhys [1.1.1.1]
b. Abt 1085 d. Bef 1136 [ =>]
- 4 Nest ferch Rhys [1.1.1.1]
(Unknown wife of Rhys ap Tewdyr)
- 4 Gruffydd ap Rhys [1.1.1.2]
b. Abt 1090 d. 1137 [ =>]
- 4 Gruffydd ap Rhys [1.1.1.2]
- 3 Gwyn ap Tewdwr Mawr ap Cadell [1.1.2]
b. Abt 1030
- 4 Llywarch ap Gwyn ap Tewdwr Mawr ap Cadell [1.1.2.1]
b. Abt 1070 [ =>]
- 4 Llywarch ap Gwyn ap Tewdwr Mawr ap Cadell [1.1.2.1]
- 3 Rhys ap Tewdyr, King of Deheubarth [1.1.1]
- 2 Tewdwr Mawr ap Cadell ab Einion ab Owain [1.1]