Surname Thoom (Thoom 
, ตูม ) , in all the world, is a rare cognomen. The cognomen Thoom is habitual in Myanmar, where it is a rare surname, India, where it is a very rare surname, and Thailand, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in India, Myanmar, and the United States. Also, Thoom is the forename as well as the last name.