Nielsen Hayden genealogy
Descendants of (Unknown wife or mistress of Madog ap Maredudd)
![Female](img/tng_female.gif)
(Unknown wife or mistress of Madog ap Maredudd)
   │
Rhys ap Gruffydd, King of Deheubarth
(Abt 1132 -
   │ 24 Apr 1197 bur.St Davids Cathedral, St. Davids, Pembrokeshire, Wales)
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   │ 24 Apr 1197 bur.St Davids Cathedral, St. Davids, Pembrokeshire, Wales)
   │    │    ├─ Gronwy ab Ednyfed Fychan ap Cynwrig ab Iorwerth
(of Trecasteil, Anglesey, Wales - 1268) =>
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   │    │    │ + Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd
(Abt 1200 - ??)
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   │    │    └─ Gruffudd ab Ednyfed Fychan ap Cynwrig ab Iorwerth
( - 1246) =>
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   │    └─ Gruffudd ab Yr Arglwydd Rhys
( - 25 Jul 1201 Strata Florida Abbey, Ceredigion, Wales)
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
   │    
Matilda de Briouze
( - 29 Dec 1210 Llanbardarn Fawr, Ceredigion, Wales)
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   │        └─ Owain ap Gruffudd ab Yr Arglwydd Rhys
( - 18 Jan 1236 Strata Florida Abbey, Ceredigion, Wales) =>
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
   │        └─ Madog ap Gruffudd ab Owain Brogyntyn ap Madog
(Abt 1200 - ??) =>
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   │         +
       └─ Llywelyn Fawr ap Iorwerth
(Abt 1173 - 11 Apr 1240 Aberconwy Abbey, Conwy, Wales)
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        :   │ + John de Brewes
(Abt 1197 of Gower, Swansea, Wales - Between 1231 and 1232)(m. 1219)
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
        :   │ + Walter IV de Clifford
(of Clifford, Herefordshire, England - Bef 23 Dec 1263)(m. Bef 2 Nov 1234)
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        :   └─ Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd
(Abt 1200 - ??) =>
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
        :   └─ Grufudd ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd
( - 1 Mar 1244 Tower of London,
        :    London, England) =>
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
        :    London, England) =>
       
Joan of England
(Bef 1190 - 30 Mar 1236 bur.Llanvaes, Anglesey, Wales)(m. Bef 23 Mar 1205)
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        :   ├─ Gwladus Ddu
( - 1251 Windsor, Berkshire, England) =>
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
        :   │ + Reynold de Briouze
(of Abergavenny, Monmouthshire, Wales - Between 1227 and 1228)(m. 1215)
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
        :   │ + Ralph de Mortimer
(of Wigmore, Herefordshire, England -
        :   │ 6 Aug 1246 bur.Wigmore Abbey, Herefordshire, England)(m. Bef 26 Oct 1230)
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        :   │ 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)
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)