Nielsen Hayden genealogy
Descendants of Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd
Abt 1230 -Father: Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchtrud ( - Aft 1237)
Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd (Abt 1230 - ??)
   └─ Angharad ferch Ithel Fychan ab Ithel Gam ap Hen Ithel Gam ap Maredudd ab Uchdrud ab Edwin (of Tegeingl,
    Wales - ??)
    Wales - ??)
    Tudur ap Gronwy ab Ednyfed Fychan ap Cynwrig ( - 1311)
       └─ Gronwy ap Tydyr HĂȘn ap Gronwy (of Penmynydd, Anglesey, Wales - 1331 bur.Bangor, Gwynedd, Wales)
        Gwerfyl ferch Madog (of Hendwr in Edeirnion, Merionethshire, Wales - Aft 1293)
           └─ Tudur ap Gronwy ( - 1367 Trecasteil, Anglesey, Wales) =>
            + Margred ferch Thomas (of Iscoed, Ceredigion, Wales - ??)