I got the nick-name Aussie when I joined the army in 1972 after coming back from Australia, I had a right Aussie accent and when one of the NCO's asked where was I from and I told him he said "Ok, we will call you Aussie as we have too many with names like Skippy, Blue, Wally (Wallabee) etc..." and that name has stuck since 1972, even at my last job before I retired they called me Aussie.