German: from Middle High German hane ‘rooster’, hence a
nickname for a conceited or sexually active man. In some instances it
may have been a habitational name from a house bearing the sign of a
rooster.
German: patronymic from a reduced form of the personal
name Johannes (see John). This surname is also found in
Denmark and Sweden.
Jewish (Ashkenazic): ornamental name from
German Hahn ‘rooster’, one of the many Ashkenazic surnames
based on vocabulary words denoting birds or animals.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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