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Cognomen Claudus (Claude , Claudus ) , around the globe, is a common surname. The family name Claudus is characteristic of Rwanda, where it is a common surname, Luxembourg, where it is quite a common surname, and Gabon (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in France, Rwanda, and Cameroon. More prevalently, Claudus is the forename as well as the last name.