Globally, Сию (Siju 
, Сию 
, Siiu 
) is quite a common mostly boy's, but uncommonly girly first name. The first name Сию is habitual in Western Asia, particularly United Arab Emirates, where it is quite a rare male name, Oman, and Bahrain. Measured by absolute frequency, it most frequently occurs in India, Nigeria, and United Arab Emirates. Much less frequently, Сию is the last name as well as the forename.