Nielsen Hayden genealogy
Descendants of Radnailt of Dublin
Father: Amlaíb mac Sitric ( - 1034)
Mother: Máelcorcre ingen Dúnlaing
Radnailt of Dublin
   └─ Gruffydd ap Cynan ab Iago, King of Gwynedd (Abt 1055 - 1137)
    (Unknown wife or mistress of Gruffudd ap Cynan)
    :   └─ Gwenllian ferch Gruffudd
    :    Cadwgon ap Bleddyn ap Cynfyn ( - 1111)
    :        + Jane ferch Cynwrig
    Angharad ferch Owain ( - 1162)(m. Abt 1095)
       ├─ Owain Gwynedd, King of Gwynedd ( - 1169 bur.Bangor Cathedral, Bangor, Gwynedd, Wales)
       │ Gwladus ferch Llywarch
       │ :   ├─ Iorwerth Drwyndwn ap Owain Gwynedd ( - Abt 1174) =>
       │ :   │ + Margred ferch Madog
       │ :    + Owain Cyfeiliog ap Gruffudd ap Maredudd ap Bleddyn ap Cynfyn (Abt 1130 -
       │ :    1197 Monastery of Strata Marcella, Welshpool, Montgomeryshire, Wales)
       │ :    1197 Monastery of Strata Marcella, Welshpool, Montgomeryshire, Wales)
       │ Cristin ferch Gronwy ab Owain ab Edwin (of Tegeingl, Wales - ??)
       │ :   │ + Gryffydd "Maelor" ap Madog, Prince of Northern Powys (of Powys Fadog, Wales -
       │ :   │ 1191 Castle of Dinas Bran, Nanheudwy, Wales)
       │ :   │ 1191 Castle of Dinas Bran, Nanheudwy, Wales)
       │ :    +
       │ (Unknown mistress of Owain Gwynedd)
       │     + Hwfa ap Cynwrig ap Rhiwallon ap Dingad ap Tudur Trefor (Abt 1130 - ??)
       │     + Cadwgon ap Madog ap Cadwgon ap Bleddyn
       ├─ Susanna ferch Gruffydd ap Cynan
       │ Madog ap Maredudd, Prince of Powys Fadog ( - 1160 Winchester, Hampshire, England)
       │    └─ Gryffydd "Maelor" ap Madog, Prince of Northern Powys (of Powys Fadog, Wales -
       │     1191 Castle of Dinas Bran, Nanheudwy, Wales) =>
       │     1191 Castle of Dinas Bran, Nanheudwy, Wales) =>
       │     + Angharad ferch Owain
       ├─ Gwenllian ferch Gruffudd ( - 1136)
       │ Gruffydd ap Rhys (Abt 1090 - 1137)
       │    └─ Rhys ap Gruffydd, King of Deheubarth (Abt 1132 -
       │     24 Apr 1197 bur.St Davids Cathedral, St. Davids, Pembrokeshire, Wales) =>
       │     24 Apr 1197 bur.St Davids Cathedral, St. Davids, Pembrokeshire, Wales) =>
       │     + Gwenllian ferch Madog ( - 1160)
       └─ Cadwaladr ap Gruffudd ap Cynan, King in Wales ( - 1172 bur.Bangor Cathedral, Bangor, Gwynedd, Wales)
        Aliz de Clara (m. Bef 1151)
           └─ Richard ap Cadwaladr ap Gruffudd ap Cynan (Abt 1170 - ??) =>
            + Annes ferch Gwyn Ddistain