Cadwallon ab Ieuaf King Gwynedd was born to Idwal "Ieuaf aka Junior" Aberffraw.
In 985 Cadwallon ab Ieuaf King Gwynedd succeeded King Gwynedd.
In 986 Cadwallon ab Ieuaf King Gwynedd was killed by Maredudd ab Owain King Deheubarth King Powys King Gwynedd -999.
Paternal Family Tree: Aberffraw
Kings Gwynedd: Grand Son of Idwal ap Anaward "Foel aka Bald" King Gwynedd -942
Kings Powys: Great x 4 Grand Son of Cadell ap Brochfael King Powys -808
Great x 4 Grandfather: Gwriad ap Elidyr Aberffraw
Great x 3 Grandfather: Merfyn "Frych aka Freckled" King Gwynedd -844
Great x 4 Grandmother: Esyllt Anglesey
Great x 2 Grandfather: Rhodri ap Mervyn "The Great" King Gwynedd 820-
Great x 4 Grandfather: Cadell ap Brochfael King Powys -808
Great x 3 Grandmother: Nest ferch Cadell Cadelling Queen Consort Gwynedd
Great x 1 Grandfather: Anaward Aberffraw
GrandFather: Idwal ap Anaward "Foel aka Bald" King Gwynedd -942