Nielsen Hayden genealogy
Descendants of Matilda de Briouze
- 1210Father: William de Briouze (of Briouze, Normandy, France - 9 Aug 1211 Corbeil, near Paris, France)
Mother: Maud de St. Valéry (Abt 1150 - 1210 Windsor, Berkshire, England)
Matilda de Briouze ( - 29 Dec 1210 Llanbardarn Fawr, Ceredigion, Wales)
Gruffudd ab Yr Arglwydd Rhys ( - 25 Jul 1201 Strata Florida Abbey, Ceredigion, Wales)
   └─ Owain ap Gruffudd ab Yr Arglwydd Rhys ( - 18 Jan 1236 Strata Florida Abbey, Ceredigion, Wales)
    (Unknown daughter of Gwion Sais)
       └─ Maredudd ab Owain ap Gruffudd ab Yr Arglwydd Rhys ( - Mar 1265 Llanbardarn Fawr, Ceredigion, Wales)
        (Unknown daughter of Thomas ap Rhodri)
           └─ Owain ap Maredudd ab Owain ap Gruffudd (of Iscoed, Ceredigion, Wales -
            15 Aug 1275 bur.Strata Florida Abbey, Ceredigion, Wales) =>
            15 Aug 1275 bur.Strata Florida Abbey, Ceredigion, Wales) =>
            +