Nielsen Hayden genealogy
Descendants of Máelcorcre ingen Dúnlaing
Father: Dunlaing Mac Tuathail, King of Leinster ( - Apr 1014 Clontarf, Dublin, Ireland)
Máelcorcre ingen Dúnlaing
Amlaíb mac Sitric ( - 1034)
   └─ Radnailt of Dublin
    Cynan ab Iago
       └─ Gruffydd ap Cynan ab Iago, King of Gwynedd (Abt 1055 - 1137)
        (Unknown wife or mistress of Gruffudd ap Cynan)
        :    + Cadwgon ap Bleddyn ap Cynfyn ( - 1111)
        Angharad ferch Owain ( - 1162)(m. Abt 1095)
           ├─ Owain Gwynedd, King of Gwynedd ( - 1169 bur.Bangor Cathedral, Bangor, Gwynedd, Wales) =>
           │ + Gwladus ferch Llywarch
           │ + Cristin ferch Gronwy ab Owain ab Edwin (of Tegeingl, Wales - ??)
           │ + (Unknown mistress of Owain Gwynedd)
           │ + Madog ap Maredudd, Prince of Powys Fadog ( - 1160 Winchester, Hampshire, England)
           │ + Gruffydd ap Rhys (Abt 1090 - 1137)
           └─ Cadwaladr ap Gruffudd ap Cynan, King in Wales ( - 1172 bur.Bangor Cathedral, Bangor, Gwynedd,
            Wales) =>
            Wales) =>
            + Aliz de Clara (m. Bef 1151)