Surname Thri (Thri 
, สาม 
) , in all the world, is a rare cognomen. The cognomen Thri is characteristic of Myanmar, where it is quite a rare surname, Morocco, where it is a very rare surname, and Thailand. Measured by absolute frequency, it is the most numerous in Myanmar, India, and Indonesia. More prevalently, Thri is the forename as well as the last name.