Cognomen Semsan (Semsan 
) , around the globe, is a rare last name. The cognomen Semsan is habitual in Thailand, where it is a rare surname, India, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Thailand, India, and Nigeria. Likewise, Semsan is the forename as well as the last name.