Family name Khusai (Khusai 
, Хусай 
, คู่สาย) , all over the world, is a very rare surname. The last name Khusai is characteristic of Kyrgyzstan, where it is a very rare surname, Kazakhstan, and Thailand, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in India, Kazakhstan, and Thailand. More prevalently, Khusai is the forename as well as the last name.