Surname Xyu (Хыу 
, Xyu 
) , in the entire world, is a very rare family name. The cognomen Xyu is habitual in Indonesia, where it is a very rare surname, Thailand, where it is an extremely rare surname, and Russia. Measured by absolute frequency, the name is most common in Indonesia, China, and Thailand. More prevalently, Xyu is the forename as well as the last name.