In the entire world, Сумио (Sumio 
, Сумио 
) is quite a common predominantly feminine, but very infrequently boy's first name. The first name Сумио is characteristic of Japan, where it is quite a rare female name, Afghanistan, where it is a rare boy's name, and the United States, where it is an extremely rare largely boy's, but seldom girly name. Measured by absolute frequency, it is the most numerous in Japan, Afghanistan, and China. Very seldom, Сумио is the last name as well as the forename.