As in Senna.
For me and where we live (rural midlands) it would be pronounced Eye-er-TON.
For DP and his family (north west) it'd be EYE'er-t'n.
I prefer his pronunciation but sound weird saying it like that myself, it just doesn't fit with my accent and it won't with our friends, his sister, my family, the school etc who will all pronounce it with the emphasis on the TON.
I'm over thinking this aren't i? We're not even set on the name and don't even know its a boy. It's just that our difference in accents seem to make a big difference to a name in my head.
I think the hormones are taking over