| 1. | Idwal Foel Ap Anarawd Mawr was born in 883 in Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom; died in 942. Idwal married Avandreg Mawr in 915. Avandreg (daughter of King of Powys Merfyn Ap Rhodri Mawr) was born in 888; and died. [Group Sheet] [Family Chart]
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| 2. | Meurig Ap Idwal Foel Mawr Family/Spouse: Unknown. [Group Sheet] [Family Chart]
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| 3. | King of North Wales Idwel Fychan Ap Meurig Mawr Family/Spouse: Unknown. [Group Sheet] [Family Chart]
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| 4. | Prince of Gwynedd Iago Ap Idwal Mawr Family/Spouse: Avendreg Ferch Gwair, of Powys. Avendreg was born in 984 in Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom; and died. [Group Sheet] [Family Chart]
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