Cognomen Coigny (Coigny 
) , all over the world, is a very rare surname. The last name Coigny is habitual in Switzerland, where it is a rare surname, France, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Coigny is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Coigny | United States, France, Switzerland |
| marie françoise de franquetot coigny FR (b. 1648) |
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| louise marthe coigny (b. 1759) |
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| diane de gramont de coigny (1889-1955) (b. 1889) |
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| christian coigny Swiss photographer, CH (b. 1946) |
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| alexandre coigny Swiss racing driver, CH (b. 1975) |
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