Surname มหาสมุทร (Ocen 
, Mahasamut 
, มหาสมุทร ) , throughout the world, is quite a rare cognomen. The last name มหาสมุทร is habitual in Uganda, where it is quite a rare surname, Thailand, where it is a rare surname, and Argentina. Measured by absolute frequency, the name is most common in Uganda, Indonesia, and Thailand. Likewise, มหาสมุทร is the forename as well as the last name.