Nielsen Hayden genealogy
Descendants of Maredudd ab Owain ap Gruffudd ab Yr Arglwydd Rhys
- 1265Father: Owain ap Gruffudd ab Yr Arglwydd Rhys ( - 18 Jan 1236 Strata Florida Abbey, Ceredigion, Wales)
Mother: (Unknown daughter of Gwion Sais)
Maredudd ab Owain ap Gruffudd ab Yr Arglwydd Rhys ( - Mar 1265 Llanbardarn Fawr, Ceredigion, Wales)
   └─ 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)
       
           └─ Thomas ap Llewellyn ab Owain ap Maredudd (of Iscoed, Ceredigion, Wales - 1343) =>
            + Elinor ferch Maredudd