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Male Seiseisyll Ap Gwrwst Click to view Seiseisyll Ap Gwrwst in the family tree

Seiseisyll Ap's father was Gwrwst Ap Rhiwallon.  His paternal grandfather was Rhiwallon Ap Cunedda.  He was an only child.  He died in Y.


Seiseisyll Ap's family

He had a biological son named Antonius.

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