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Family name Soir (سوير , Soar , Soir ) , all over the world, is quite a rare cognomen. The cognomen Soir is habitual in the United Kingdom, where it is quite a rare surname, Libya, and New Zealand, where it is a rare surname. In absolute terms, it is commonest in the United Kingdom, Indonesia, and Australia. Also, Soir is the forename as well as the last name.