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An old English name with even older Nordic roots. It's derived from the Old Norse word "Kolbyr", which means "cold settlement". Also a kind of cheese, but don't bother joking about it with someone named Colby. I guarantee you they've already heard it. You might not want to name your kid this if you live in the southern U.S. People there have a habit of saying "Koby" instead, and it might drive them nuts.
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