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Last name Sikder (Sikder , সিকদার , Сикдер ) , in the entire world, is a widespread surname. The last name Sikder is characteristic of Bangladesh, where it is quite a common surname, Qatar, and Oman (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Bangladesh, India, and Saudi Arabia. Much less frequently, Sikder is the forename as well as the last name.