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Koby (plural Kobys)
- A surname.
- According to the 2010 United States Census, Koby is the 38801st most common surname in the United States, belonging to 569 individuals. Koby is most common among White (93.85%) individuals.
- Hanks, Patrick, editor (2003), “Koby”, in Dictionary of American Family Names, volume 2, New York City: Oxford University Press, →ISBN, page 326.