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Surname Karhu (Karhu
, Карху
) , globally, is quite a common last name. The last name Karhu is habitual in Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is quite a rare surname, and Latvia. Not in comparison with a country's population, it is the most numerous in Finland, Russia, and Sweden. Much less frequently, Karhu is the forename as well as the last name.