The Commission has determined that a county constituency be created from:The Bangor Aberconwy UK Parliamentary constituency,and:The Ynys Môn UK Parliamentary constituency.
Mae’r Comisiwn wedi penderfynu creu etholaeth sirol o’r canlynol:Etholaeth Seneddol y Deyrnas Unedig Bangor Aberconwy,ac:Etholaeth Seneddol y Deyrnas Unedig Ynys Môn.