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Cognomen Koem (Koem , เกิม ) , in the entire world, is a rare family name. The family name Koem is characteristic of South-eastern Asia, particularly Cambodia, where it is a rare surname, Indonesia, and Malaysia, where it is a very rare surname. In absolute terms, it is the most numerous in South-eastern Asia, particularly Indonesia, Cambodia, and Thailand. Much less frequently, Koem is the forename as well as the last name.