Cunedda

4th century Welsh military leader and first King of Gwynedd. Cunedda successfully rallies North Wales against Irish invaders. 
Roman withdrawal left North Wales defenseless and subject to increasing raids by marauders from the Ynys Manaw and Ierne, a situation which led Cunedda, his sons and their entourage, to migrate in the mid-5th century from Manaw Gododdin to settle and defend North Wales against the raiders and to bring the region within Romano-British control. 
Cunedda and his forebears led the Votadini against Pictish and Irish incursions south of Hadrian's Wall. Sometime after this, the Votadini troops under Cunedda relocated to North Wales to defend the region from Irish invasion, specifically against the Uí Liatháin. Cunedda established himself in Wales, especially in Venedotia, the territory of the Venedoti, previously Ordovician, which would become the center of Gwynedd. 
Cunedda brings order to North Wales, and after his death, Gwynedd is divided among eight to over ten of his sons and direct descendants: Einion, Meirion, Dunod, Ceredig, Dogfael, Rhufon, Edern, Tybion, Osfeilion, Ysfael and Afloeg, into numerous princedoms: Meirionydd, Dunoding, Ceredigion, Rhos, Dogfeiling, Rhufoniog, Osfael, Edeirnion, Tegeingl, and others. 
Son of Edeyrn. 
Cunedda ap Edern or Cunedda Wledig