Iago III ap Idwal King of Gwynedd
Iago III ap was born about 0974 in Aberffraw Castle, Malltraeth, Anglesey, Wales.  He died about 1039.¹ 

 Avendreg Of Powys
Avendreg Of was born about 0984 in Aberffro, Malltraeth, Anglesey, Wales.

 Crisli verch Iago
Crisli verch was born about 0993 in Gwynedd, Wales.

 Cynan ap Iago Prince of North Wales
Cynan ap was born about 1014 in Aberffro, Malltraeth, Anglesey, Wales.  He died about 1060.¹ 

 Tangwystl verch Iago
Tangwystl verch was born about 1020 in Gwynedd, Wales.  She died after 1075.