Family name Duplan (Duplan 
, دوبلان 
) , in the entire world, is quite a rare cognomen. The family name Duplan is characteristic of France, where it is quite a rare surname, Haiti, and Switzerland. Measured by absolute frequency, it most frequently occurs in France, Haiti, and Mexico. Much less frequently, Duplan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Duplan | Mexico, Haiti, France, United States, Switzerland |
| دوبلان | Iran |
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joseph duplan French politician, FR (b. 1791) |
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| louis germain duplan French politician, FR (b. 1759) |
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| pierre duplan French politician, FR (b. 1806) |
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| jean duplan French politician, FR (b. 1812) |
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| charles duplan Swiss politician (1813-1890), CH (b. 1813) |
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| jean-léopold duplan FR (b. 1861) |
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| nicole duplan, ép. maunoury (b. 1869) |
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edmond duplan FR (b. 1930) |
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| louis duplan French Catholic priest and resistance fighter (1902-1959), FR (b. 1902) |
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| roger duplan FR (b. 1899) |
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édouard duplan French footballer, FR (b. 1983) |
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| j. f. duplan (b. 1924) |
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| gérard duplan French politician, FR (b. 1952) |
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| antoine duplan Swiss journalist and film critic, CH (b. 1957) |
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| jean pierre duplan (b. 1950) |
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