Nielsen Hayden genealogy
Gwladus ferch Rhiwallon
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Elen ferch Llywarch
-0929
-0929
Gwerystan
0955-
0955-
Maredudd ap Owain
-0999
-0999
Cynfyn ap Gwerystan
1000-
1000-
Rhiwallon ap Cynfyn
1020-1069
1020-1069