Nielsen Hayden genealogy
Descendants of Slani ingen Briain
Father: Brian Boru, King of Munster and Ireland ( - 23 Apr 1014 Clontarf, Dublin, Ireland)
Mother: (Unknown wife of Brian Boru)
Slani ingen Briain
Sitric mac Amlab, King of Dublin ( - 1042)
   └─ Amlaíb mac Sitric ( - 1034)
    Máelcorcre ingen Dúnlaing
       └─ 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)
            + Angharad ferch Owain ( - 1162)(m. Abt 1095)