[Opinions] Re: Replying for everyone :)
Where I live, Aaron, Ashley, and Mariana are "air-in", "ash-lee" (rhymes with cash/ash/rash/etc), and "mair-ee-ah-na". But I'd still automatically read Arin as "ahr-in". If I had never heard of the name Aaron before, I'd also pronounce that with an "ah" sound.