Nielsen Hayden genealogy
Family: Maredudd ap Tudur / Margred ferch Dafydd Vychan (F12979)
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Male
Maredudd ap Tudur
Birth Death Aft 1406 Burial Marriage Father Tudur ap Gronwy | F12980 Group Sheet Mother Margred ferch Thomas | F12980 Group Sheet
Female
Margred ferch Dafydd Vychan
Birth of Trefeilir in Malltraeth, Anglesey, Wales 
Death Burial Father Dafydd Fychan ap Dafydd Llwyd ap Cynwrig | F12981 Group Sheet Mother Nest ferch Ieuan ap Gruffudd | F12981 Group Sheet
Male
+ Owen ap Maredudd ap Tudur
Birth Abt 1400 Death 4 Feb 1461 Hereford, Herefordshire, England 
Burial Hereford, Herefordshire, England 
Spouse Catherine of Valois, Queen Consort of England | F10049 Marriage Between 1429 and 1430