Orin is not an Irish boys name.
Odhran, or Oran would be acceptable.
Orán - you've put in an accent which would make the pronunciation entirely different. An Irish person might think you were talking about bread (arán).
If you want the name to be authentically Irish, you will need to include only the following letters - a, b, c, d, e, f, g, h, i, l, m, n, o, p, r, s, t, u. All of the vowels may have a síneadh fada - this will change the pronunciation. Definite NO to J, K, Q, V, W, X, Y, Z
@Fivemoreminutes1 and @user1492757084 have given some interesting suggestions - which look like they are pulled from an American website, most of them are bastardised versions of Irish surnames. Nigel gave me a fit of the giggles!
@Mouk has done better but has missed out on a síneadh fada here and there.
Keep it simple, use a name which does not require an accent if you are living in the UK
My suggestion is Fionn