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Throughout the world, ثير (Thure , Thyre , ثير ) is a rare masculine first name. The given name ثير is habitual in Sweden, where it is quite a rare boy's name, Israel, where it is a rare mostly boy's, but seldom girly name, and Finland, where it is a rare boy's name. Not in comparison with a country's population, it is commonest in Sweden, Israel, and Germany. Likewise, ثير is the last name as well as the forename.
ثير is also a name for the fictitious and mythical characters: Tam Sventon , the fictional private detective based in Stockholm.