Nielsen Hayden genealogy
Ancestors of Gruffudd ap Maredudd
┌── Gwerystan (Abt 955 - ??)
┌── Cynfyn ap Gwerystan (Abt 1000 - ??)
┌── Bleddyn ap Cynfyn, King of Gwynedd & Powys ( - 1075)
│ │ ┌── Owain ap Hywel Dda, King of Deheubarth ( - 988) =>
│ │ ┌── Maredudd ap Owain ( - 999)
│ └── Angharad ferch Maredudd
│
┌── Maredudd ap Bleddyn ap Cynfyn (of Powys, Wales - 1132)
│ │
│ │ ┌── Cillin y Blaidd Rhudd
│ └── Haer ferch Cillin
│
│
│ ┌── Einudd ap Morien ap Morgeneu ab Elystan ap Gwaithfoed (Abt 1070 of Dyffryn Clwdd, Denbighshire,
│ │ Wales - ??)
│ │ Wales - ??)