Americanized form of Jewish (from Ukraine) Kogan, from
the Russian pronunciation of Cohen.
Irish (of Welsh
origin): habitational name from an area near Cardiff, which may have
been named with a Welsh word meaning ‘bowl’, ‘depression’. There is
evidence of a family named de Cogan in the 12th century, and by
the 13th century the name was also associated with Somerset, Devon,
County Limerick, and County Cork.
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