רב יהודאי בן נחמן גאון היה ראש ישיבת סורא (757–761), ואחד מחשובי הגאונים. רב יהודאי היה סגי נהור.
Yehudai ben Nahman was the head of the yeshiva in Sura from 757 to 761, during the Geonic period of Judaism. He was originally a member of the academy of Pumbedita, but Exilarch Solomon ben Hisdai appointed him as Gaon of Sura as "there is no one there as distinguished as he is for wisdom".
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