Apropos of nothing, in the very early days of mobiles when I was toying with the idea of txtspk (don't use it at all any more I might add!), my friend was texting me about her new baby. I said 'wht hv u clld hr?'
She came back with 'rn'
Could I figure out what the baby was called? could I buggary.
I'm Irish and have never met an Irish 'Erin'. Its very much an Irish-American thing. I don't think there's anything wrong with non-Irish people using Irish names. A lot of supposedly 'English' names were lifted from Greek, Lati or Hebrew yonks back.