Nielsen Hayden genealogy
Family: Cadwgon ap Madog ap Cadwgon ap Bleddyn / Gwenllian ferch Owain Gwynedd (F17605)
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Male
Cadwgon ap Madog ap Cadwgon ap Bleddyn
Birth Death Burial Marriage Father Madog ap Cadwgon ap Bleddyn ap Cynfyn | F17606 Group Sheet Mother Jane ferch Cynwrig | F17606 Group Sheet
Female
Gwenllian ferch Owain Gwynedd
Birth Death Burial Other Spouse Hwfa ap Cynwrig ap Rhiwallon ap Dingad ap Tudur Trefor | F17585 Marriage Father Owain Gwynedd, King of Gwynedd | F17586 Group Sheet Mother (Unknown mistress of Owain Gwynedd) | F17586 Group Sheet
Male
+ Madog ap Cadwgon ap Madog ap Cadwgon
Birth Abt 1170 of Nannau, Meirionnydd, Wales 
Death Burial Spouse Efa ferch Madog ap Philip ab Uchtrud | F17604 Marriage