Cognomen خاو (Khao 
, Khaou 
, خاو 
) , all over the world, is quite a common family name. The family name خاو is characteristic of Mongolia, where it is quite a common surname, Myanmar, where it is quite a rare surname, and Hong Kong, where it is a rare surname. Measured by absolute frequency, this name is the most popular in India, Mongolia, and Myanmar. Likewise, خاو is the forename as well as the last name.