In all the world, ธีรสุข (Theerasuk 
, Thirasuk , ธีรสุข ) is a very rare predominantly male, but very seldom female forename. The first name ธีรสุข is habitual in South-eastern Asia, particularly Thailand, where it is a very rare predominantly male, but scarcely female name. Also, ธีรสุข is the last name as well as the forename.