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Last name Dehaan (德翰 , Dehaan , Дехан ) , in the world, is quite a rare surname. The surname Dehaan is characteristic of Canada, where it is quite a rare surname, the United States, where it is a rare surname, and Cuba. Measured by absolute frequency, this name is the most popular in the United States, Canada, and Indonesia. Much less frequently, Dehaan is the forename as well as the last name.