Around the globe, Usan (Usan 
, Усан 
, อุสัน 
) is quite a rare mostly boy's, but uncommonly feminine forename. The forename Usan is characteristic of Japan, where it is quite a rare masculine name, Kyrgyzstan, and Kazakhstan, where it is a rare male name. Measured by absolute frequency, this name is the most popular in Japan, India, and Nigeria. Very seldom, Usan is the last name as well as the forename.