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Cognomen Teston (Tester , Teston , Tostão ) , worldwide, is a common surname. The family name Teston is habitual in the United Kingdom, where it is quite a rare surname, Australia, and France. Not in comparison with a country's population, this name is the most popular in the United States, the United Kingdom, and Philippines. Very seldom, Teston is the forename as well as the last name.