Family name Delaunay (Delaunay 
, ドロネー, Делоне 
) , in the world, is a common cognomen. The surname Delaunay is habitual in France, where it is quite a common surname, Gabon, where it is quite a rare surname, and Belgium, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in France, the United States, and Argentina. Very seldom, Delaunay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Delaunay | Gabon, France, Canada, United States, Argentina |
| Делоне | Ukraine, Russia |
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nicolas delaunay FR (b. 1646) |
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| pierre delaunay (b. 1650) |
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| louis-marcel delaunay French painter (1680-) (b. 1680) |
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| pierre delaunay FR (b. 1675) |
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nicolas delaunay French engraver (1739-1792), FR (b. 1739) |
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joseph delaunay French politician (1752-1794), FR (b. 1752) |
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| jean-marie delaunay French politician, FR (b. 1723) |
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| jacques charles rené delaunay French general, FR (b. 1738) |
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| jacques françois marie delaunay French politician (1753-1832), FR (b. 1753) |
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| pierre-marie delaunay French politician, FR (b. 1755) |
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| pierre françois delaunay French artist (1759-1789), FR (b. 1759) |
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| pierre-rené-léonard delaunay French politician, FR (b. 1764) |
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charles-eugène delaunay French astronomer (1816-1872), FR (b. 1816) |
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| simon-césar delaunay FR (b. 1760) |
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louis arsene delaunay French actor, FR (b. 1826) |
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