Koppen

== English == === Etymology === Borrowed from Dutch Koppen or German Köppen. === Proper noun === Koppen (plural Koppens) A surname. ==== Statistics ==== According to the 2010 United States Census, Koppen is the 37341st most common surname in the United States, belonging to 597 individuals. Koppen is most common among White (97.32%) individuals. === Further reading === Hanks, Patrick, editor (2003), “Koppen”, in Dictionary of American Family Names, volume 2, New York: Oxford University Press, →ISBN, page 337.