I live in the south suburbs of chicago. Here from what ive experienced 95 percent of non african americans use ant for aunt. However I have noticed that the african american population predominantly uses the pronunciation unt as apposed to ahnt. I am indeed very surprised to have not heard anyone else on this post say the same thing. Im assuming this means that there is either a confusion between ahnt unt and ont or perhaps it is a very small regional slang. anyhow thought it was interesting.