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Family name 소이 (Soi , Soy , 소이 ) , in the entire world, is a common cognomen. The surname 소이 is characteristic of Kenya, where it is quite a common surname, Turkey, and Macao, where it is quite a rare surname. In absolute terms, this name is the most popular in India, Turkey, and Kenya. Much less frequently, 소이 is the forename as well as the last name.