Surname โสมทัต (Somadat 
, Somdat 
, โสมทัต ) , all over the world, is a rare cognomen. The family name โสมทัต is habitual in Thailand, where it is a rare surname, Nigeria, where it is an extremely rare surname, and the United States. In absolute terms, the name is most common in Thailand, India, and Nigeria. Much more prevalently, โสมทัต is the forename as well as the last name.