Surname 加君 (Jiajun 
, 加君 ) , across the world, is quite a rare last name. The last name 加君 is characteristic of Singapore, where it is quite a rare surname, Taiwan, where it is a rare surname, and Malaysia. Measured by absolute frequency, the name is most common in China, Taiwan, and Malaysia. Much more frequently, 加君 is the forename as well as the last name.