Worldwide, Siden (Siden 
, Сиден 
, สิเด็น 
) is a rare largely boy's, but seldom girly first name. The first name Siden is habitual in Indonesia, where it is a very rare masculine name, Philippines, where it is a very rare gender-neutral name, and India, where it is an extremely rare epicene name. More frequently, Siden is the last name as well as the forename.