Family name Хангаи (Hangai 
, Хангаи) , in all the world, is a rare last name. The cognomen Хангаи is characteristic of Mongolia, where it is quite a rare surname, Hungary, and Tanzania, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Brazil, Hungary, and Tanzania. Very seldom, Хангаи is the forename as well as the last name.