Cognomen Khao (Khao 
, Хао 
, เคาช์ ) , in the entire world, is quite a common last name. The cognomen Khao is habitual in 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, it is commonest in India, Mongolia, and Myanmar. Also, Khao is the forename as well as the last name.