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Last name Giam (เจียม , Giam , Чу ) , in the world, is quite a rare family name. The family name Giam is habitual in South-eastern Asia, particularly Singapore, where it is quite a common surname, Brunei, where it is quite a rare surname, and Malaysia. Not in comparison with a country's population, the name is most common in Malaysia, Singapore, and Russia. Likewise, Giam is the forename as well as the last name.