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Family name Weill (Weill , Вайль , וייל ) , in the world, is quite a rare cognomen. The last name Weill is characteristic of Bermuda, where it is quite a rare surname, Switzerland, and France. Not in comparison with a country's population, the name is most common in France, the United States, and Switzerland. Very seldom, Weill is the forename as well as the last name.