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Last name Ohlsson (Ohlsson , Олссон ) , all over the world, is a common cognomen. The family name Ohlsson is characteristic of Sweden, where it is quite a common surname, Denmark, where it is quite a rare surname, and Luxembourg. Measured by absolute frequency, the name is most common in Sweden, the United States, and South Africa. Much less frequently, Ohlsson is the forename as well as the last name.