Nielsen Hayden genealogy
Family: Gwerystan / (F17582)
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Female
+ Elinor ferch Gwerystan
Birth of Powys, Wales 
Death Burial Spouse Cadell ab Einion ab Owain ap Hywel Dda | F4171 Marriage
Female
+ Lleuci ferch Gwerystan
Birth Abt 980 Death Burial Spouse Llywarch Gam ap Lluddocca ap Tudur Trefor | F23116 Marriage
Male
+ Cynfyn ap Gwerystan
Birth Abt 1000 Death Burial Spouse Angharad ferch Maredudd | F2994 Marriage Spouse (Unknown wife or mistress of Cynfyn ap Gwerystan) | F2334 Marriage