I believe that this is not related to Aoibhinn and Aoibheann (which are EE-ven).Aoibhín is EE-veen and my guess is that it's a diminutive of Aoibh (Eve) just as Róisín is a diminutive of Róise. [noted -ed]
Aoibhín isn't a variant of Aoibheann. It's a diminitive of Aoibhe. It means "little Aoibhe", while Aoibheann means "beautiful sheen". -ín is a dimintive suffix in Irish, like -y in English.
― Anonymous User 7/16/2009
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I love this name! I think it's lovely. It sounds so beautiful and elegant, and the only Aoibhín I know is exactly like her name. It'a a great alternative to the overly-popular Aoife. It makes me think of an intelligent girl who's got long, brown, wavy hair, green eyes, and a great personality. Aoibhín isn't a common name in Ireland, but it isn't unheard of, either. Plus, using this name would give me an excuse to make her nickname Evo (which is a name I really like, but, unfortunately it's a car), and I would spell it Aoibhó, so no one would be any the wiser. :)
Aoibhín is EE-veen and my guess is that it's a diminutive of Aoibh (Eve) just as Róisín is a diminutive of Róise. [noted -ed]