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All around the world, Eiler (Eiler , Эйлер ) is a rare primarily masculine, but very seldom girly forename. The first name Eiler is habitual in Denmark, where it is a rare masculine name, Norway, and Peru. In absolute terms, the name is most common in Peru, Denmark, and Colombia. More frequently, Eiler is the last name as well as the forename.
Eiler is also a name for the fictitious and mythical characters: Eiler , the operatic character in the opera Der Schauspieldirektor by Wolfgang Amadeus Mozart; a banker.