Unless I am reading this post wrong..
I am from Iowa, U.S.A. and have always called it a Fanny Pack, and a postman, a post man, or else Mail man.
"I suppose if I were a lot older--like 40 or 50--I'd be a wonderful sugar daddy to some little queen down in Kensington. I'd have a houseboy named Richard to order around."DB, 1976