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In all the world, מרטנס (Mertens , Martens , מרטנס ) is a rare gender-neutral first name. The first name מרטנס is habitual in Belgium, where it is quite a rare unisex name, Albania, where it is a rare feminine name, and Slovakia, where it is a rare boy's name. Measured by absolute frequency, it is the most numerous in Belgium, Indonesia, and China. Much more frequently, מרטנס is the last name as well as the forename.
מרטנס is also a name for the fictitious and mythical characters: .