Nielsen Hayden genealogy
Ancestors of Owain ap Hywel Dda, King of Deheubarth
- 988 ┌── Gwriad (of the Isle of Man - ??)
┌── Merfyn Frych ap Gwriad, King of Gwynedd ( - 844)
│
┌── Rhodri Mawr, King of Gwynedd ( - 878)
┌── Cadell ap Rhodri, King of South Wales ( - 910)
┌── Hywell Dda ap Cadell, King of South Wales (Abt 875 - 950)
│
│ ┌── Bleidigg
│ ┌── Hyfaidd ap Bleiddig, King of Dyfed ( - 893)
│ │ │
│ │ │ ┌── Owain ap Maredudd ( - 811) =>
│ │ └── Tangwystyl ferch Owain
│ │
│ ┌── Llywarch ap Hyfaidd ( - 904)
└── Elen ferch Llywarch ( - 929)