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Last name Bertrand (Bertrand , ベルトラン , Бертранд , and others...) , around the globe, is a widespread family name. The surname Bertrand is characteristic of Dominica, where it is a common surname, France, where it is quite a common surname, and Monaco (explore the name in all countries). In absolute terms, the name is most common in France, Cameroon, and the United States. Likewise, Bertrand is the forename as well as the last name.