Cognomen 隆军 (Longjun 
, 隆军 ) , in the world, is a rare last name. The family name 隆军 is characteristic of China, where it is a very rare surname, Thailand, and the United States, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in China, Thailand, and India. Much more frequently, 隆军 is the forename as well as the last name.