- Einion Offeiriad ("Einion the Priest") (died 1356), Welsh poet and grammarian
- Einion ap Gwalchmai (1202–1223), Welsh court poet
- Einion ap Gwgon (fl. c. 1215), Welsh court poet
- Einion ap Gollwyn, (possibly legendary) Welsh prince of the eleventh century
- Einion Wan (fl. c. 1202–1245), Welsh court poet
- Saint Einion Frenin (c. 5th century), a son of Owain Ddantgwyn who reigned as a local king in Gwynedd
- Einion Yrth ap Cunedda (c. 420–500; reigned from the 470s), king of Gwynedd
- Cefn Einion, small dispersed village in South Shropshire, England
- Anian (disambiguation)
- Anianus (disambiguation)
- Eifion (disambiguation)
- Baring-Gould, Sabine & al. The Saints of Wales and Cornwall and Such Irish Saints as Have Dedications in Britain, Vol. II, pp. 422 ff. The Hon. Society of Cymmrodorion (London), 1907. Hosted at Google Books. Accessed 18 Nov 2014.
- It is unrelated to the now identical Welsh word einion meaning "anvil".
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