Erin doesn't really make me think of
Ireland.
Erin and
Aaron sound almost the same when I say them out loud (the main difference is in the "in"/"on") but they sound more different in my head.
I usually like the name
Erin. It depends on how much they fit it though.
Megan is like egg.
Meghan is similar but maybe softer on the "g" sound.
Megan is way better than
Meghan.
I know quite a few, from various places in the U.S. and various ages. Mostly in their 20's and 30's I think.