Family name Injun (인준 
, Injun 
) , in the world, is a rare surname. The last name Injun is characteristic of Thailand, where it is a rare surname, South Korea, and Myanmar, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Thailand, South Korea, and China. More prevalently, Injun is the forename as well as the last name.