Llywelyn ap SEISYLL & Angharrad verch MAREDYDD 
They had a son named Gruffydd ap.
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Personal Details
Llywelyn ap SEISYLL
Llywelyn ap was born in 0980 in Rhuddian, Flintshire, Wales. He died at the age of 41 in 1021.
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Children
Gruffydd ap LLEWELLYN
Gruffydd ap was born about 1000 in Rhudlan, Flintshire, Wales. He died on August 5th, 1063 in Snowdonia, Wales.