Cognomen Хаир (Khair 
, Hair 
, Хаир 
) , in all the world, is a common last name. The last name Хаир is characteristic of Western Asia, particularly Oman, where it is quite a common surname, United Arab Emirates, and Bahrain (explore the name in all countries). Not in comparison with a country's population, it is commonest in India, Bangladesh, and Indonesia. Likewise, Хаир is the forename as well as the last name.