Last name Irin (Irin 
, ไอริณ , ไอรินทร์ ) , in the entire world, is quite a common cognomen. The surname Irin is characteristic of Bangladesh, where it is quite a rare surname, Indonesia, where it is a rare surname, and Oman. Measured by absolute frequency, this name is the most popular in Bangladesh, Indonesia, and Japan. More prevalently, Irin is the forename as well as the last name.