Nielsen Hayden genealogy
Family: Ieuan ap Gruffudd ap Hywel / Efa ferch Gruffudd ap Dafydd Goch ap Dafydd (F12985)
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Male
Ieuan ap Gruffudd ap Hywel
Birth Abt 1300 of Eifionydd, Caernarvonshire, Wales 
Death Burial Marriage Father Gruffudd ap Hywel ap Maredudd ab Einion | F17583 Group Sheet Mother Angharad ferch Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd | F17583 Group Sheet
Female
Efa ferch Gruffudd ap Dafydd Goch ap Dafydd
Birth Death Aft 1351 Burial Father Gruffudd ap Dafydd Goch ap Dafydd ap Gruffudd | F17589 Group Sheet Mother
Female
+ Nest ferch Ieuan ap Gruffudd
Birth of Eifionydd, Caernarvonshire, Wales Death Burial Spouse Dafydd Fychan ap Dafydd Llwyd ap Cynwrig | F12981 Marriage