Yeah, sorta like Airy and Erin imexceot not quite cause Erin is Eh-RIN in my accent and Aerin is AIR-en. So a subtle difference, but people go for the more familiar version and it will be mixed up. As a person who has spent a life time pronouncing and spelling and explaining her name, it doesn't bother me so much though :)
And yes, I see the ditzy association for some people. I'd use Airhead as a synonym for ditzy, while airy would be light and fresh and dreamy. But that would be a potential issue and a point in the only using it as a nn column.
Thanks for the feedback.
http://www.behindthename.com/pnl/56287