[Opinions] Re: Pronounce Arin?
I would assume "air-in", because to me it's an alternate spelling of Erin. (similarly my brother is Aric as an alternate of Eric)
However, I wouldn't say your parents are wrong and others are right because clearly your name IS "ah-rin", so unless that were using it in the aforementioned for I don't know that there is a "right" way to pronounced it. I don't know if your name is of ethnic origin or not, but that could influence things too.
~Anna~