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Cognomen Seyl (Сеил
, Сейль
, Seyl
) , worldwide, is a rare family name. The surname Seyl is habitual in Kyrgyzstan, where it is quite a rare surname, Algeria, where it is a rare surname, and Germany. Measured by absolute frequency, it most frequently occurs in Germany, the United States, and Algeria. Also, Seyl is the forename as well as the last name.