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Cognomen Cathan (Cathan ) , in the entire world, is a rare family name. The surname Cathan is characteristic of Mauritius, where it is quite a common surname, Malaysia, where it is a very rare surname, and Australia. Not in comparison with a country's population, this name is the most popular in Mauritius, the United States, and the United Kingdom. Much less frequently, Cathan is the forename as well as the last name.