Family name Demuynck (Demuynck 
) , in the entire world, is quite a rare last name. The cognomen Demuynck is characteristic of Belgium, where it is quite a common surname, France, where it is quite a rare surname, and Czechia, where it is a rare surname. In absolute terms, this name is the most popular in Belgium, France, and the United States. Much less frequently, Demuynck is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Demuynck | Canada, Belgium, United States, France, Spain |
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christian demuynck French politician, FR (b. 1947) |
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| karel demuynck Belgian sculptor, BE (b. 1899) |
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| octaaf demuynck (b. 1899) |
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| guy demuynck BE (b. 1951) |
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| karel demuynck Belgian tennis player, BE (b. 1965) |
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| arnaud demuynck French film producer, film director and screenwriter, FR (b. 1966) |
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| jan demuynck Belgian performing artist, BE |
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| marie anne demuynck Ph.D. University of North Texas 1996 |
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| robin demuynck researcher (ORCID 0000-0001-7930-8347) |
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| frans demuynck Belgian performing artist, BE |
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| ruben demuynck researcher |
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| catherine demuynck researcher |
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| colette demuynck chemist |
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| claire demuynck scientist |
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| koen demuynck Belgian cyclist, BE (b. 1981) |
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