Cognomen Haii (Haii 
, Хайи 
) , in all the world, is a rare last name. The last name Haii is characteristic of Saudi Arabia, where it is a rare surname, Russia, where it is a very rare surname, and Japan. Not in comparison with a country's population, it is commonest in India, Russia, and Japan. Also, Haii is the forename as well as the last name.