נחשון גאון, כונה הרנ"ג, היה רב, אסטרונום ומתמטיקאי. כיהן כראש ישיבת סורא בבבל במשך 7 שנים (ד'תרל"ב - ד'תרל"ט.
Nahshon ben Zadok Gaon was head of the Academy of Sura from 874 to 882, in succession to Mar Amram ben Sheshna. He wrote explanations to difficult words in the Talmud, not in alphabetical order, as did his contemporary Gaon Ẓemaḥ ben Paltoi of Pumbedita, but in the order of the tractates. The Re'umah, on ritual slaughtering, is ascribed to him, but his authorship is doubtful.
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