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Cognomen Iwamatsu (Iwamatsu
, Мако
) , all around the world, is a rare family name. The surname Iwamatsu is habitual in Bulgaria, where it is a rare surname, Peru, where it is a very rare surname, and Ukraine. Measured by absolute frequency, this name is the most popular in Bulgaria, Brazil, and Ukraine. Likewise, Iwamatsu is the forename as well as the last name.