Nielsen Hayden genealogy
Ancestors of Bleddyn ap Cynfyn, King of Gwynedd & Powys
- 1075 ┌── Gwerystan (Abt 955 - ??)
┌── Cynfyn ap Gwerystan (Abt 1000 - ??)
│ ┌── Cadell ap Rhodri, King of South Wales ( - 910) =>
│ ┌── Hywell Dda ap Cadell, King of South Wales (Abt 875 - 950)
│ ┌── Owain ap Hywel Dda, King of Deheubarth ( - 988)
│ │ │ ┌── Llywarch ap Hyfaidd ( - 904) =>
│ │ └── Elen ferch Llywarch ( - 929)
│ │
│ ┌── Maredudd ap Owain ( - 999)