Last name Chhen (Chhen 
, เฉิน 
) , all over the world, is quite a rare family name. The last name Chhen is habitual in Thailand, where it is quite a rare surname, Cambodia, where it is a rare surname, and Australia. Measured by absolute frequency, this name is the most popular in Thailand, the United States, and Cambodia. Very seldom, Chhen is the forename as well as the last name.