Around the globe, Ястин (Jastin 
, Yastin 
, Ястин 
) is a common primarily boy's, but very infrequently girly forename. The first name Ястин is characteristic of Tanzania, where it is quite a common masculine name, Qatar, where it is a rare boy's name, and India, where it is a rare primarily boy's, but scarcely female name. In absolute terms, the name is most common in Tanzania, India, and Indonesia. Much less frequently, Ястин is the last name as well as the forename.