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Male Gruffydd ap Llywelyn Fawr Lord Lleyn Click to view Gruffydd ap Llywelyn Fawr Lord Lleyn in the family tree

Gruffydd ap Llywelyn Fawr was born in of Caernarvonshire, Wales.1   Gruffydd ap Llywelyn Fawr's father was Llewelyn De Lorwerth and his mother was Tangwystl Goch Of Rhos Verch Llywarch.  His paternal grandparents were Iowerth Ap Owain Gwynedd and Margred Verch Madog; his maternal grandparents were Llywarch Goch Ap Iowerth and Tangwystl Ferch Llywarch. He had two sisters named Gwladys and Gwenllian. He had six half-brothers and four half-sisters, named Howel Ap Ednyfed Fychan Bishop Of, Sir Tudor Of Nant, Iorwerth ap Ednyfed Fychan, Kendrig Ap Ednyfed, Llewelyn Moiety Of Creuthyn, Rhys, Elen Verch, Margaret Ferch, Angharad and Gwenllian Of Brynffenigl Verch Ednyfed.  He died  due to Killed in a fall climbing out of his chamber in the Tower of London. in Tower of London, London, England.1 

1 Joanne's Tree.1 GED.GED
Further sources/citations:
Some Descents of Llywelyn the Great, Royal Genealogies DB, University of Hull Royal Database (England), Ancestral Roots of Certain American Colonists Who Came to America bef1760 @ line 260, Ahnentafel for Margery Arundell, Royal Highness, Ancestry of the Royal Child @ pp 10-11, daveanthes.FTW

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