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Surname Louthan (Louthan
) , in the entire world, is quite a rare cognomen. The surname Louthan is characteristic of Czechia, where it is a rare surname, the United States, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in the United States, Czechia, and the United Kingdom. Very seldom, Louthan is the forename as well as the last name.