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Surname Deuce (Deus , Duo , Deuce ) , in the entire world, is a widespread last name. The cognomen Deuce is characteristic of Tanzania, where it is quite a common surname, Brazil, and Portugal (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Brazil, China, and Tanzania. Very seldom, Deuce is the forename as well as the last name.