Cognomen Htain (Htain 
) , in the entire world, is quite a rare family name. The surname Htain is habitual in South-eastern Asia, particularly Myanmar, where it is quite a rare surname, Singapore, where it is a rare surname, and Malaysia. Measured by absolute frequency, it most frequently occurs in South-eastern Asia, particularly Myanmar, Malaysia, and Indonesia. More frequently, Htain is the forename as well as the last name.