Surname Dedecker (Dedecker 
) , in all the world, is quite a rare family name. The surname Dedecker is characteristic of Belgium, where it is quite a common surname, France, where it is a rare surname, and Canada. Measured by absolute frequency, it is commonest in Belgium, the United States, and France. Much less frequently, Dedecker is the forename as well as the last name.
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| Dedecker | Canada, Belgium, France, Netherlands, United States |
| henri dedecker association football player (1878-1935), BE (b. 1878) |
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jean-marie dedecker Belgian politician, judo coach, BE (b. 1952) |
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| paul dedecker American botanical collector (1907-2003), US (b. 1907) |
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| mary dedecker American botanist and conservationist (1909-2000), US (b. 1909) |
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marc dedecker BE (b. 1950) |
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| paul dedecker Belgian mathematician (1921-2007), BE (b. 1921) |
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peter dedecker Belgian politician, BE (b. 1983) |
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| frank dedecker Belgian rower, BE (b. 1950) |
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guy dedecker BE |
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| jane dedecker American sculptor (b. 1961) |
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| marc dedecker (b. 1953) |
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| mieke dedecker Belgian performing artist, BE |
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| jérôme dedecker Ph.D. Université Paris-Sud XI - Orsay 1998 |
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| jim dedecker college basketball player (1971–1972) Illinois |
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| peter dedecker researcher |
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