:Einion Yrth ap Cunedda

{{Short description|King of Gwynedd from c. 470 to c. 480}}

{{hatnote|Not to be confused with Einion Frenin, king of Llyn and Einion Yrth's grandson.}}

{{Use British English|date=July 2024}}

{{Use dmy dates|date=August 2019}}

Einion Yrth ap Cunedda ({{circa|lk=no|440}}{{cite book |title=Bwletin Y Bwrdd Gwybodau Celtaidd |url=https://books.google.com/books?id=04BnAAAAMAAJ |year=1978 |publisher=University of Wales Press |page=99}} – c. 500; {{abbr|reigned}} {{circa|lk=no|470}} – c. 480{{Cite book |last=Ashley |first=Michael |url=https://books.google.com/books?id=tz6gAAAAMAAJ&q=Einion+Yrth |title=British Monarchs: The Complete Genealogy, Gazetteer, and Biographical Encyclopedia of the Kings and Queens of Britain |publisher=Robinson |year=1998 |isbn=9781854875044 |page=142}}), also known as Einion Yrth (Welsh for "the Impetuous"), was a king of Gwynedd. He is claimed as an ancestor of the later rulers of North Wales.{{cite book |author=National Library of Wales |title=Cylchgrawn Llyfrgell Genedlaethol Cymru |url=https://books.google.com/books?id=f2saAAAAMAAJ |year=1978 |publisher=Council of the National Library of Wales |page=213}}

One of the sons of Cunedda,{{cite book |author=William Jenkins Rees |title=Lives of the Cambro British Saints |url=https://books.google.com/books?id=rmtlAAAAMAAJ&pg=PA593 |year=1853 |publisher=W. Rees |page=593}} he travelled with his father to North Wales in the early 450s to expel Irish raiders from the region.{{Citation needed|date=November 2014}} After his father's death, Einion inherited control over the newly founded kingdom of Gwynedd. Aided by his brother Ceredig, ruler of Ceredigion, and his nephew Meirion, ruler of Meirionnydd, Einion built upon his father's successes and further established his family's rule in the region. He was succeeded by two sons: Cadwallon Lawhir and Owain Danwyn.