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Family name Bahtiar (Bahtiar , Бахтиар , Бахтяр ) , worldwide, is a common surname. The family name Bahtiar is habitual in South-eastern Asia, particularly Indonesia, where it is quite a common surname, Malaysia, where it is quite a rare surname, and Singapore. Not in comparison with a country's population, it is the most numerous in Indonesia, Malaysia, and Saudi Arabia. Very seldom, Bahtiar is the forename as well as the last name.