The name Aerin is a girl's name . Aerin and is often added to user-created lists like Names that don't suck and discussed in our forums with posts like "Baby a Day".
From the experts:
In Tolkien's world, the derivation of this airy name is Elvish. Regular folks might consider it an artsier form of Erin, borne by cosmetics heiress and socialite Aerin Lauder.