My wife took her Detroit friend to Nashville, and her family called the visitor "MAY-ree." I still call her that sometimes.
I might have told it on some thread here: In the Army in my early 20s, I was stationed in South Dakota. Home on leave to NYC suburbs, I dated a girl from the Bronx for a week. I went back to my post with a Bronx accent -- which I enjoyed, and which lasted about 48 hours. My native accent was Michigan, but I picked up a little NY in 4 years of high school there. But only a little, until I dated that gorgeous girl.