Globally, Saiin (Saiin 
, Сайин 
) is a rare unisex forename. The given name Saiin is characteristic of Uzbekistan, where it is a rare boy's name, Indonesia, where it is a rare largely boy's, but infrequently female name, and Kazakhstan, where it is a very rare masculine name. In absolute terms, this name is the most popular in Indonesia, India, and Uzbekistan. More frequently, Saiin is the last name as well as the forename.