| 1. | Avandreg Mawr was born in 888; and died. Avandreg married Idwal Foel Ap Anarawd Mawr in 915. Idwal (son of Prince of Gwynedd Anarawd Ap Rhodri Mawr) was born in 883 in Aberffraw Castle, Aberffraw, Anglesey, Wales, United Kingdom; died in 942. [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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