well as my user name suggest, my name is Erin and I'm a girl LOL. I've never heard of it for a boy before, I've only heard Aaron for boy & Erin for girl. But I get called Aaron alot

I've been looking at the way to pronounce it as you put it & that's how I say my name Erin.

Erin is actually an Irish Girls name also, or English version of. It can be used for both sexes but it's originally used as a feminine forename. Erin is the name given to the female personification of Ireland.