Oein

In terms of etymology it is though to be derived from the Shelta words for “Seer”, as a phonetical interpretation of the Gaelic/ Irish word Ogham.

Pronounced “o-eye-n” its unusual spelling, although rare is though to be an example of the philology of comparative linguistics.

Sometimes it is in error interpreted as Eoin (Gaelic for John) or Eoghan (which possibly means “born from the yew tree” in Old Celtic).

Both of which are sometimes used as a Gaelic form of Eugene.