Iowerth Drwyndwn Ap Owain of+ Gwynedd & Marared Verch+ Madog 
They had a son named Llewelyn Mawr ap Iowerth Of+.
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Personal Details
Iowerth Drwyndwn Ap Owain of+ Gwynedd
Iowerth Drwyndwn Ap Owain of+ was born about 1130 in Aberffraw Castle, Aberffraw, Anglesey, Wales. He died about 1174 in Pennant Mehangell.
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Children
Llewelyn Mawr ap Iowerth Of+ Gwynedd
Llewelyn Mawr ap Iowerth Of+ was born in 1173 in Aberffraw Castle, Caernarvonshire, Wales. He died at the age of 67 on April 11th, 1240 in Aberconwy, arlechwedd Isaf, Caernarvonshire, Wales.