Family name Joc (Joc 
, Jocus 
) , all around the world, is a rare surname. The family name Joc is characteristic of Lithuania, where it is quite a rare surname, Nepal, where it is a rare surname, and Romania. Not in comparison with a country's population, it is the most numerous in Nepal, Indonesia, and Romania. More prevalently, Joc is the forename as well as the last name.