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Throughout the world, Θαλής (Thalis , Taleso , Θαλής ) is quite a rare principally male, but very infrequently female first name. The forename Θαλής is characteristic of Greece, where it is quite a rare unisex name, Brazil, where it is quite a rare boy's name, and Tanzania, where it is a very rare female name. Very seldom, Θαλής is the last name as well as the forename.