Nielsen Hayden genealogy
Descendants of Angharad ferch Gynffydd ap Tydyr
Angharad ferch Gynffydd ap Tydyr
Dafydd Llwyd (of Bwlch y fen, Anglesey, Wales - ??)
   └─ Dafydd Fychan ap Dafydd Llwyd ap Cynwrig (of Trefeilir in Malltraeth, Anglesey, Wales - ??)
    Nest ferch Ieuan ap Gruffudd (of Eifionydd, Caernarvonshire, Wales - ??)
       └─ Margred ferch Dafydd Vychan (of Trefeilir in Malltraeth, Anglesey, Wales - ??)
        Maredudd ap Tudur ( - Aft 1406)
           └─ Owen ap Maredudd ap Tudur (Abt 1400 - 4 Feb 1461 Hereford, Herefordshire, England) =>
            + Catherine of Valois, Queen Consort of England (27 Oct 1401 Hotel de St. Pol, Paris, France -
            3 Jan 1437 Bermondsey Priory, Surrey, England)(m. Between 1429 and 1430)
            3 Jan 1437 Bermondsey Priory, Surrey, England)(m. Between 1429 and 1430)