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Cognomen Wilbert (Wilbert , 威尔 , Вилберт ) , worldwide, is a common last name. The cognomen Wilbert is habitual in Nicaragua, where it is quite a common surname, Mexico, where it is quite a rare surname, and Tanzania. Measured by absolute frequency, this name is the most popular in Mexico, Tanzania, and the United States. More frequently, Wilbert is the forename as well as the last name.