Last name Duthu (Duthu 
) , worldwide, is quite a rare cognomen. The surname Duthu is characteristic of France, where it is quite a rare surname, Sweden, where it is a rare surname, and Argentina, where it is a very rare surname. In absolute terms, it is the most numerous in France, the United States, and Argentina. Much less frequently, Duthu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Duthu | United States, Sweden, Argentina, India, France |
| marie-françoise duthu French politician and economist, FR (b. 1946) |
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| alain duthu French politician, FR (b. 1950) |
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| hervé duthu French journalist, FR (b. 1952) |
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| jean-pierre duthu French politician, FR (b. 1954) |
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| jean-marie duthu French politician, FR (b. 1955) |
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| hélène duthu French politician, FR (b. 1958) |
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| gilles duthu French politician, FR (b. 1959) |
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| carine duthu (b. 1986) |
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| sylvain duthu FR (b. 1988) |
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