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Last name Sadiman (Sadiman ) , worldwide, is quite a rare surname. The last name Sadiman is characteristic of Indonesia, where it is quite a rare surname, Malaysia, where it is a rare surname, and Australia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in South-eastern Asia, particularly Indonesia, Malaysia, and Philippines. Likewise, Sadiman is the forename as well as the last name.