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Last name Saanum (Saanum ) , worldwide, is a rare cognomen. The cognomen Saanum is characteristic of Norway, where it is quite a rare surname, Sweden, where it is a rare surname, and Canada, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Norway, Sweden, and Nigeria. Much less frequently, Saanum is the forename as well as the last name.