Family name Feigenbaum (Feigenbaum 
, פייגנבאום , Фейгенбаум 
) , in the entire world, is quite a rare surname. The cognomen Feigenbaum is characteristic of Israel, where it is quite a rare surname, Estonia, and the United States, where it is a rare surname. Not in comparison with a country's population, the name is most common in the United States, Israel, and Germany.
| VARIANT | COUNTRY |
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| Feigenbaum | Japan, Israel, France, United States, Germany |
| פייגנבאום, פייגנבוים | Israel |
| Фейгенбаум | Kazakhstan, Ukraine, Russia |
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carl feigenbaum German murderer and suspected serial killer, US (b. 1840) |
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benjamin feigenbaum Polish born Yiddish socialist, newspaper editor, translator, and satirist, PL (b. 1860) |
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william m. feigenbaum American statistician, journalist and politician from New York, US (b. 1886) |
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| rosa feigenbaum FR (b. 1853) |
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| rebekka feigenbaum holocaust victim, b. 1866-01-10, AT (b. 1866) |
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| hillel feigenbaum holocaust victim, b. 1874-06-10, AT (b. 1874) |
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| ida feigenbaum DE (b. 1866) |
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| salie feigenbaum holocaust victim, b. 1876-04-01, AT (b. 1876) |
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edward albert feigenbaum American computer scientist, US (b. 1936) |
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| dorian feigenbaum Austrian psychoanalyst (b. 1887) |
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| hans feigenbaum holocaust victim, b. 1891-11-26 (b. 1891) |
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mitchell feigenbaum American mathematical physicist, US (b. 1944) |
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| heinrich feigenbaum (b. 1897) |
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| beila feigenbaum Victim of the Holocaust, PL (b. 1915) |
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| samuel feigenbaum person identified in the Museu da Pessoa collection, PL (b. 1919) |
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