Cognomen Dejonghe (Dejonghe 
) , across the world, is quite a rare last name. The last name Dejonghe is characteristic of Western Europe, particularly Belgium, where it is quite a common surname, Luxembourg, where it is quite a rare surname, and France. Not in comparison with a country's population, this name is the most popular in Belgium, France, and the United States. Much less frequently, Dejonghe is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dejonghe | France, Afghanistan, United States, Belgium, Canada |
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albert dejonghe Road bicycle racer (1894-1981), BE (b. 1894) |
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| georges dejonghe Belgian athletics competitor (1917-1998), BE (b. 1917) |
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| étienne dejonghe French historian and writer, FR (b. 1933) |
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sam dejonghe Belgian racing driver, BE (b. 1991) |
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| bernard dejonghe Frans; (in bewerking); 1942; Chantilly (Oise), FR (b. 1942) |
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| henri dejonghe French politician, FR (b. 1946) |
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| léon dejonghe BE (b. 1946) |
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| georges dejonghe French politician, FR (b. 1957) |
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| willem dejonghe Senior Partner, Allen & Overy LLP, since 2016 (b. 1961) |
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| geert dejonghe Belgian speed skater, BE (b. 1965) |
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| carla dejonghe Belgian politician, BE (b. 1966) |
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| herwig dejonghe (b. 1957) |
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| trudo dejonghe (b. 1964) |
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| wim dejonghe researcher |
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| len dejonghe Belgian cyclocross rider, BE |
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