Jacob Eichenbaum | |
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| Born | Jacob Gelber 12 October 1796 Krystynopil, Volhynian Governorate, Russian Empire |
| Died | 27 December 1861 (aged 65) Kyiv, Kyiv Governorate, Russian Empire |
| Occupation | Teacher, poet |
| Language | Hebrew |
| Nationality | Galician Jew |
| Citizenship | Russian Empire |
| Period | Haskalah |
| Subject | Mathematics |
| Literary movement | Modern Hebrew poetry |
| Years active | 1815–1861 |
| Relatives | Vsevolod and Boris Eikhenbaum (grandsons) |
Jacob Moiseyovych Eichenbaum (Yiddish: יעקב בן־משה אייכענבוים, Ukrainian: Я́ків Мойсе́йович Ейхенба́ум; 12 October 1796 – 27 December 1861), born Jacob Gelber, was a Galician Jewish maskil, educator, poet and mathematician.