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Cognomen Sumo (Sumo , سومو ) , across the world, is quite a common last name. The family name Sumo is characteristic of Liberia, where it is quite a common surname, Cameroon, where it is quite a rare surname, and Myanmar. Measured by absolute frequency, the name is most common in Liberia, Indonesia, and Philippines. Likewise, Sumo is the forename as well as the last name.