Family name Myshchyshyn (Myshchyshyn 
, Мищишин 
) , throughout the world, is a rare cognomen. The cognomen Myshchyshyn is habitual in Ukraine, where it is quite a rare surname, Greece, where it is a rare surname, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, the name is most common in Ukraine, Russia, and Greece.