Nielsen Hayden genealogy
Descendants of Madog ap Maredudd, Prince of Powys Fadog
- 1160Father: Maredudd ap Bleddyn ap Cynfyn (of Powys, Wales - 1132)
Mother: Hunydd ferch Einudd
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
:       └─ Madog ap Gruffudd Maelor ap Madog ap Maredudd ap Bleddyn (of Powys Fadog, Wales -
:        1236 bur.Valle Crucis Abbey, Llantysilio, Denbighshire, Wales)
:        1236 bur.Valle Crucis Abbey, Llantysilio, Denbighshire, Wales)
:        Gwladus ferch Ithel ap Rhys ab Ifor ap Hywel ap Morgan Fychan ap Morgan Hir (of Gwent, Wales - ??)
:           ├─ Gruffudd ap Madoc (of Bromfield, Lower Powys, Wales -
:           │ 1269 bur.Valle Crucis Abbey, Llantysilio, Denbighshire, Wales) =>
:           │ 1269 bur.Valle Crucis Abbey, Llantysilio, Denbighshire, Wales) =>
:           │ + Emma de Audley (Abt 1218 of Heleigh in Audley, Staffordshire, England - Aft 22 Dec 1270)
:            +
   ├─ Gwenllian ferch Madog ( - 1160)
   │ 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 Yr Arglwydd Rhys ( - 1236)
   │    │ Ednyfed Fychan ap Cynwrig ab Iorwerth ap Gwgon ( - 1246)
   │    │    ├─ Gronwy ab Ednyfed Fychan ap Cynwrig ab Iorwerth (of Trecasteil, Anglesey, Wales - 1268) =>
   │    │    │ + Morfudd ferch Meurig (of Gwent, Wales - ??)
   │    │    │ + Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd (Abt 1200 - ??)
   │    │    └─ Gruffudd ab Ednyfed Fychan ap Cynwrig ab Iorwerth ( - 1246) =>
   │    │     + Margred ferch Einion ap Gwalchmai
   │    └─ Gruffudd ab Yr Arglwydd Rhys ( - 25 Jul 1201 Strata Florida Abbey, Ceredigion, Wales)
   │     Matilda de Briouze ( - 29 Dec 1210 Llanbardarn Fawr, Ceredigion, Wales)
   │        └─ Owain ap Gruffudd ab Yr Arglwydd Rhys ( - 18 Jan 1236 Strata Florida Abbey, Ceredigion, Wales) =>
   │         + (Unknown daughter of Gwion Sais)
   ├─ Owain Brogyntyn ap Madog ap Maredudd ap Bleddyn, King of Powys
   │ Margred ferch Einion ap Seissyll
   │    └─ Gruffudd ab Owain Brogyntyn ap Madog ap Maredudd
   │     Jonet Say
   │        └─ Madog ap Gruffudd ab Owain Brogyntyn ap Madog (Abt 1200 - ??) =>
   │         +
   └─ Margred ferch Madog
    Iorwerth Drwyndwn ap Owain Gwynedd ( - Abt 1174)
       └─ Llywelyn Fawr ap Iorwerth (Abt 1173 - 11 Apr 1240 Aberconwy Abbey, Conwy, Wales)
        (One of the several mistresses of Llywelyn ap Iorwerth)
        :   │ + John de Brewes (Abt 1197 of Gower, Swansea, Wales - Between 1231 and 1232)(m. 1219)
        :   │ + Walter IV de Clifford (of Clifford, Herefordshire, England - Bef 23 Dec 1263)(m. Bef 2 Nov 1234)
        :   │ + Donald of Mar ( - Aft 25 Jul 1297)
        :   └─ Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd (Abt 1200 - ??) =>
        :    + Gwenllian ferch Ednyfed Fychan
        Tangwystl
        :   └─ Grufudd ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd ( - 1 Mar 1244 Tower of London,
        :    London, England) =>
        :    London, England) =>
        :    + Senena ferch Caradog
        Joan of England (Bef 1190 - 30 Mar 1236 bur.Llanvaes, Anglesey, Wales)(m. Bef 23 Mar 1205)
        :   ├─ Gwladus Ddu ( - 1251 Windsor, Berkshire, England) =>
        :   │ + Reynold de Briouze (of Abergavenny, Monmouthshire, Wales - Between 1227 and 1228)(m. 1215)
        :   │ + Ralph de Mortimer (of Wigmore, Herefordshire, England -
        :   │ 6 Aug 1246 bur.Wigmore Abbey, Herefordshire, England)(m. Bef 26 Oct 1230)
        :   │ 6 Aug 1246 bur.Wigmore Abbey, Herefordshire, England)(m. Bef 26 Oct 1230)
        :    + Robert de Quincy (Bef 1200 of Wakes Colne, Essex, England - Aug 1257)(m. Bef 5 Dec 1237)
        + Eve Fitzwarine ( - Aft 1281)(m. 1239)