Last name Pahai (Pahai 
, Пахай 
) , in the world, is a very rare cognomen. The family name Pahai is characteristic of Ukraine, where it is a rare surname, Thailand, where it is an extremely rare surname, and Russia. Not in comparison with a country's population, this name is the most popular in Ukraine, India, and Russia. Likewise, Pahai is the forename as well as the last name.