Family name 용수 (용수 
, Yongsu 
, Yong-Soo 
) , globally, is a rare cognomen. The cognomen 용수 is characteristic of South Korea, where it is a rare surname, Spain, where it is an extremely rare surname, and China. Measured by absolute frequency, it is commonest in South Korea, China, and the United States. Predominantly, 용수 is the forename as well as the last name.