 The territory existed as a subordinate realm within Gwynedd until the line of rulers descended from Dunod expired in c.925.Following the end of the House of Dunod, it was split into the cantrefi of Eifionydd and Ardudwy and fully incorporated into Gwynedd.After the defeat of the kingdom of Gwynedd in 1283 and its annexation to England, the two cantrefi became parts of the counties of Caernarfonshire and Meirionnydd respectively.