Last name Donnay (Donnay 
) , across the world, is quite a rare cognomen. The surname Donnay is characteristic of Belgium, where it is quite a rare surname, France, where it is a rare surname, and Argentina. Measured by absolute frequency, it is the most numerous in Belgium, France, and the United States. Much less frequently, Donnay is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Donnay | Belgium, Spain, Argentina, France, United States |
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maurice donnay French dramatist, FR (b. 1859) |
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auguste donnay Belgian painter and printmaker (1862-1921), BE (b. 1862) |
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jean donnay Belgian painter and engraver (1897-1992), BE (b. 1897) |
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| samuel donnay Belgian politician (1866-1929), BE (b. 1866) |
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| alfredo donnay Spanish writer (1894-1986), ES (b. 1894) |
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| j. d. h. donnay Belgian-American-Canadian crystallographer and mineralogist (b. 1902) |
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roberta donnay American jazz singer, US (b. 1966) |
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| gabrielle donnay German-born American mineralogist, PL (b. 1920) |
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| jacques donnay French politician, FR (b. 1925) |
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| paul donnay BE (b. 1915) |
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| freddy donnay Belgian politician, BE (b. 1927) |
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laurent donnay Belgian cyclist, BE (b. 1988) |
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| guy donnay (b. 1933) |
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| patrick donnay Belgian actor, BE (b. 1956) |
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| marie-christine donnay badminton player, BE (b. 1958) |
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