Last name Хасайн (Hasain 
, Хасайн 
, Khasain ) , all over the world, is quite a common surname. The cognomen Хасайн is characteristic of Western Asia, particularly Oman, where it is quite a rare surname, Saudi Arabia, where it is a rare surname, and Qatar. In absolute terms, it is the most numerous in Southern Asia, particularly India, Bangladesh, and Pakistan. Much less frequently, Хасайн is the forename as well as the last name.