In Rosh HaShanah 11b, at the top of the page in the standard Vilna style printings, is a marginal gloss introduced with the word הג״ה. There is another, introduced with the same word, on the right-hand margin of 17b, and one starting with הכי גרסינן at the bottom of 35a. Who is the author of these notes?
From the fact that the Bach comments on the girsa of both the first and the last of these three notes, we can assume that their author lived prior to the 16th century. The first of them makes reference to Rashi, and the second concludes with a reference to "the Rav", but I don't know who that is referring to.