[jongle]

If it's any consolation (and assuming you're not Irish), spelling it is helpful in Dublin too as we spell it different ways here. It could be eoghan, eóghain, owen etc. So if you're making a reservation at a hotel, restaurant etc. then spelling it out won't do any harm.

[ojbyrne]

I was born in Dublin but left when I was young. It's mostly my last name people have trouble with. Not in Ireland.