Cognomen Saint-Cyr (Saint-Cyr 
) , in the entire world, is quite a rare family name. The last name Saint-Cyr is characteristic of Haiti, where it is quite a rare surname, France, where it is a rare surname, and Canada. In absolute terms, the name is most common in Haiti, France, and the Democratic Republic of the Congo. Very seldom, Saint-Cyr is the forename as well as the last name. Parts of the name also exists independently as a first name Saint, and a first name Cyr.
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| Saint-Cyr | Central African Republic, United States, Haiti, France, Democratic Republic of the Congo |
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saint-cyr nugues French officer (1774-1842), FR (b. 1774) |
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| paul antoine nolivos saint-cyr (b. 1727) |
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| jacques-antoine de révéroni saint-cyr French writer and librettist, FR (b. 1767) |
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| dominique-napoléon saint-cyr Canadian politician, CA (b. 1826) |
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| françois saint-cyr FR (b. 1824) |
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| saint-cyr girier French painter, FR (b. 1837) |
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| saint-cyr de rayssac French poet and writer, FR (b. 1837) |
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| saint-cyr penot director, engineer, FR (b. 1839) |
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| georges saint-cyr Belgian painter, BE (b. 1850) |
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renée saint-cyr French actress (1904-2004), FR (b. 1904) |
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| bernard carra de vaux saint-cyr French academic, FR (b. 1867) |
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| henry cornette de saint-cyr FR (b. 1870) |
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| charles de saint-cyr (b. 1875) |
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| jean saint-cyr French politician, FR (b. 1899) |
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| claude saint-cyr French milliner based London and Paris, FR (b. 1911) |
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