Family name Claassens (Claassens 
, ชั้น) , around the globe, is quite a rare surname. The family name Claassens is characteristic of Namibia, where it is quite a rare surname, Cayman Islands, and South Africa. Measured by absolute frequency, it is commonest in South Africa, Netherlands, and Namibia.
| VARIANT | COUNTRY |
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| Claassens | Namibia, Belgium, Netherlands, South Africa, Lesotho |
| gustaaf claassens Belgian architect (1878-1937), BE (b. 1878) |
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michael claassens South African rugby union footballer, ZA (b. 1982) |
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| pieter claassens (b. 1949) |
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| jannie claassens South African rugby union player (b. 1969) |
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| gerard henricus marie claassens NL (b. 1960) |
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| isabella e claassens researcher (ORCID 0000-0003-0320-4212) |
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| deon claassens ONE Party candidate in the 2020 New Zealand general election, NZ |
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| floris claassens Ph.D. 2020 |
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| sarina claassens researcher ORCID ID = 0000-0003-3955-4361 |
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| nico j claassens researcher |
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| daniel m f claassens researcher (ORCID 0000-0001-6338-2569) |
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| cobus claassens actor |
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| johnny claassens South African footballer, ZA |
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| johannes claassens Dutch mayor, NL |
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| jip claassens researcher |
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