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Cognomen Simai (Simai ) , throughout the world, is a common family name. The cognomen Simai is habitual in Tanzania, where it is quite a common surname, Hungary, where it is quite a rare surname, and Romania, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Tanzania, India, and Hungary. Very seldom, Simai is the forename as well as the last name.