Nielsen Hayden genealogy
Family: Owain Cyfeiliog ap Gruffudd ap Maredudd ap Bleddyn ap Cynfyn / Gwenllian ferch Owain (F270)
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Male
Owain Cyfeiliog ap Gruffudd ap Maredudd ap Bleddyn ap Cynfyn
Birth Abt 1130 Death 1197 Monastery of Strata Marcella, Welshpool, Montgomeryshire, Wales 
Burial Marriage Father Gruffudd ap Maredudd | F2039 Group Sheet Mother Gwerful ferch Gwrgeneu | F2039 Group Sheet
Female
Gwenllian ferch Owain
Birth Death Burial Father Owain Gwynedd, King of Gwynedd | F1660 Group Sheet Mother Gwladus ferch Llywarch | F1660 Group Sheet
Male
+ Gwenwynwyn
Birth Death Abt 1216 Cheshire, England Burial Spouse Margaret Corbet | F21 Marriage