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Surname Sidler (Sidler , Зидлер , Сидлер ) , in all the world, is quite a common last name. The last name Sidler is characteristic of Switzerland, where it is quite a common surname, Andorra, where it is quite a rare surname, and Belgium, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Switzerland, the United States, and France. Very seldom, Sidler is the forename as well as the last name.