Family name 인숙 (인숙 
, Insuk 
, In-Suk ) , in all the world, is quite a rare last name. The last name 인숙 is characteristic of Thailand, where it is a rare surname, South Korea, and Cambodia, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Thailand, South Korea, and China. Predominantly, 인숙 is the forename as well as the last name.