I am from Jackson, Michigan (US) and pronounce it "awnt/ont/ahnt." I do as such because of the 'u' (aunt). In Ann Arbor, most pronounce it the same way but in Jackson, it is most pronounced "ant." I see both as acceptable. English is confusing and crazy, that's the point of this website. Both are correct, "awnt" tends to be more formal. Use whichever you want and understand that others can say it differently.