Old, apocryphal story (surprised it hasn't come up yet)
Wartime QFI (Polish or Czech origin) to Stude:
"Smeeth !"...."Sir ?"...."Vot is your name ?"...."Smith, Sir !"...."No no, vot is your ozzer name ?"...."Robert, Sir"...."No no no, vot does your muzzer call you ?"....(bashfully) "Bobbie, Sir".
QFI (puts fatherly arm round stude's shoulders)....
"Well, Bobbee - you're scrubbed !" 
D.