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Family name Razu (Razu , رازو , 拉祖 ) , throughout the world, is a common surname. The surname Razu is habitual in Bangladesh, where it is quite a common surname, Oman, where it is quite a rare surname, and Qatar. Measured by absolute frequency, the name is most common in Bangladesh, Saudi Arabia, and Oman. Likewise, Razu is the forename as well as the last name.