Nielsen Hayden genealogy
Descendants of Owain ap Gruffudd ab Yr Arglwydd Rhys
- 1236Father: Gruffudd ab Yr Arglwydd Rhys ( - 25 Jul 1201 Strata Florida Abbey, Ceredigion, Wales)
Mother: 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)
   └─ 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)
       
           └─ Llywelyn ab Owain ap Maredudd ab Owain (of Cedewain, Powys, Wales - 1309) =>
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