Family name Musii (Мусій 
, Musii 
, Мусий 
) , around the world, is quite a rare surname. The last name Musii is habitual in Ukraine, where it is quite a rare surname, Russia, where it is a very rare surname, and Kazakhstan. Not in comparison with a country's population, the name is most common in Ukraine, Russia, and Indonesia. Likewise, Musii is the forename as well as the last name.