Surname Pairit (ไพฤทธิ์ 
, Pairit 
) , worldwide, is a very rare family name. The cognomen Pairit is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Thailand, China, and Malaysia. More prevalently, Pairit is the forename as well as the last name.