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Male Llywelyn Ier Ap Seisyll De Gwyned Click to view Llywelyn Ier Ap Seisyll De Gwyned in the family tree

Llywelyn Ier Ap Seisyll was born in 0980 in , Rhuddlan, , Gbr.  Llywelyn Ier Ap Seisyll's father was Seisyll Ap Ednywain N... and his mother was Prawst Verch Elised De Gwyned.  His paternal grandfather was Ednowain N...; his maternal grandfather was Elised Ap Anarawd De Gwyned.  He was an only child.  He died at the age of 43 in 1023.


Llywelyn Ier Ap Seisyll's family with Angharad Verch Maredudd De Deheubarth

They had a son named Gruffydd Ier Ap Llevelyn.

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