Nielsen Hayden genealogy
Family: Owain Gwynedd, King of Gwynedd / Gwladus ferch Llywarch (F1660)
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Male
Owain Gwynedd, King of Gwynedd
Birth Death 1169 Burial Bangor Cathedral, Bangor, Gwynedd, Wales 
Marriage Other Spouse Cristin ferch Gronwy ab Owain ab Edwin | F15927 Marriage Other Spouse (Unknown mistress of Owain Gwynedd) | F17586 Marriage Father Gruffydd ap Cynan ab Iago, King of Gwynedd | F5548 Group Sheet Mother Angharad ferch Owain | F5548 Group Sheet
Female
Gwladus ferch Llywarch
Birth Death Burial Father Llywarch ap Trahearn | F2335 Group Sheet Mother
Male
+ Iorwerth Drwyndwn ap Owain Gwynedd
Birth Death Abt 1174 Burial Spouse Margred ferch Madog | F993 Marriage
Female
+ Gwenllian ferch Owain
Birth Death Burial Spouse Owain Cyfeiliog ap Gruffudd ap Maredudd ap Bleddyn ap Cynfyn | F270 Marriage