Last name Opsomer (Opsomer 
) , all around the world, is quite a rare cognomen. The last name Opsomer is habitual in Belgium, where it is quite a rare surname, Luxembourg, and North Macedonia, where it is a rare surname. In absolute terms, it is the most numerous in Belgium, France, and the United States. Very seldom, Opsomer is the forename as well as the last name.
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| Opsomer | Belgium, North Macedonia, Bulgaria, United States, France |
| louis joseph opsomer FR (b. 1737) |
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| jozef-august opsomer politician (1813-1891) (b. 1813) |
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| d. opsomer (b. 1913) |
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| carmélia opsomer Belgian historian, BE (b. 1947) |
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| denis opsomer French politician, FR (b. 1955) |
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| els opsomer Belgian visual artist, BE (b. 1968) |
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| geert opsomer (b. 1965) |
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| jan opsomer (b. 1966) |
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| marlies opsomer Belgian actress, BE |
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| karl opsomer researcher |
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| jean opsomer Ph.D. Cornell University 1995 |
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| sophie opsomer researcher (ORCID 0000-0002-8956-5678) |
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| geert opsomer researcher (ORCID 0000-0002-6131-1000) |
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| m-a opsomer researcher |
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| tomas opsomer researcher |
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