Surname Kiffer (Kiffer 
, Kiffen 
) , worldwide, is quite a rare cognomen. The family name Kiffer is habitual in Luxembourg, where it is quite a rare surname, Angola, and France. Measured by absolute frequency, it is commonest in France, Angola, and Brazil. Much less frequently, Kiffer is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kiffer | Brazil, United States, Germany, Democratic Republic of the Congo, France |
| Kiffen | Brazil, Netherlands, Germany, France, Angola |
| charles kiffer French painter, FR (b. 1902) |
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| robert kiffer French spy, FR (b. 1913) |
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| jean kiffer French politician, FR (b. 1936) |
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| étienne kiffer (b. 1939) |
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| carlos r v kiffer researcher |
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| markus kiffer researcher (ORCID 0000-0002-1356-8653) |
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| kiffer g card researcher |
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| walace kiffer researcher, ORCID id # 0000-0002-0847-9031 |
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| etienne kiffer botanist |
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| charliene kiffer goude Swedish local politician, SE |
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| max kiffer Luxembourgian volleyball player, LU (b. 1995) |
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