Worldwide, Birnbaum (Birnbaum 
, Бирнбаум 
, בירנבאום ) is an extremely rare largely male, but infrequently girly forename. Much more prevalently, Birnbaum is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Birnbaum | Poland, France, Israel, United States, Germany |
| Бирнбаум | Kazakhstan, Russia |
| בירנבאום, בירנבוים | Israel |
Birenbaum, Birnbaumová, Birnboim, Birnboym, and Бірнбаум
| pessel birnbaum holocaust victim, b. 1862-01-03 (b. 1862) |
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| morton birnbaum American physician, US (b. 1926) |
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| meyer birnbaum (b. 1918) |
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| lee birnbaum researcher |
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| irwin m. birnbaum member or fellow of the New York Academy of Medicine |
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| morris j birnbaum researcher |
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