Cognomen Reinfeld (Reinfeld 
, Рейнфельд 
, ריינפלד ) , throughout the world, is quite a rare family name. The last name Reinfeld is habitual in Estonia, where it is quite a rare surname, Austria, and Germany, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Austria. Very seldom, Reinfeld is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Reinfeld | Germany, Austria, Estonia, United States, Israel |
| Рейнфельд | Kazakhstan, Russia, Ukraine |
| ריינפלד | Israel |
| stefanie reinfeld holocaust victim, b. 1886-08-30, AT (b. 1886) |
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| joseph reinfeld (b. 1891) |
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| fred reinfeld American chess player (1910-1964), US (b. 1910) |
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| henriette reinfeld holocaust victim, b. 1916-04-27, AT (b. 1916) |
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| gerhard reinfeld German politician, DE (b. 1944) |
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konstantin reinfeld German composer, DE (b. 1995) |
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| barbara k. reinfeld (b. 1935) |
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| linda reinfeld (b. 1940) |
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| hal reinfeld college basketball player (1954–1956) Temple |
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| philipp augustin reinfeld Ph.D. University of London 2002 |
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| romy reinfeld |
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| tommy reinfeld |
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| emma dorothea reinfeld |
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