Nielsen Hayden genealogy
Ancestors of Margred ferch Thomas
┌── Owain ap Gruffudd ab Yr Arglwydd Rhys ( - 18 Jan 1236 Strata Florida Abbey,
│ Ceredigion, Wales) =>
│ Ceredigion, Wales) =>
┌── Maredudd ab Owain ap Gruffudd ab Yr Arglwydd Rhys ( - Mar 1265 Llanbardarn Fawr,
│ Ceredigion, Wales)
│ 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)
│ │
│ │ ┌── Thomas ap Rhodri ab Owain Gwynned (Abt 1170 - ??) =>
│
┌── Llywelyn ab Owain ap Maredudd ab Owain (of Cedewain, Powys, Wales - 1309)
┌── Thomas ap Llewellyn ab Owain ap Maredudd (of Iscoed, Ceredigion, Wales - 1343)
Margred ferch Thomas (of Iscoed, Ceredigion, Wales - ??)