The question of names. I work in a department where the main bone of employees has not changed for ten years. Here one of the same skulls forgot the pass and called with a request to order a one-off. It turned out that Kostya is not a name, but a derivative of the name Kostyn, and he is called Nicholas in general, since his student years, it has been so, because Kol is everywhere a lot and it is necessary to distinguish somehow.