Gerondi left many works, of which only a few have been preserved. The to
Alfasi on which are ascribed to "Rabbenu Yonah" were in reality written in Gerondi's name by one, if not several, of his pupils. The originally covered the entire work of Alfasi, but only the portion mentioned has been preserved. Gerondi wrote
novellæ on the
Talmud, which are often mentioned in the responsa and decisions of his pupil
Solomon Aderet and of other great rabbis, and some of which are incorporated in the of R.
Bezalel Ashkenazi.
Azulai had in his possession Gerondi's novellæ on the tractates and , in manuscript. His novellæ on the first-named tractate have since been published under the name while those on the last-named tractate form part of the collection of commentaries on the Talmud by ancient authors published by
Abraham ben Eliezer ha-Levi under the title . His commentary on was first published by Simḥah Dolitzki of Byelostok (Berlin and Altona, 1848) and was translated into English for the first time by Rabbi David Sedley of TorahLab. The work is wrongly attributed to Gerondi. A commentary by him on
Proverbs, which is very highly praised (see
Bahya ben Asher's preface to his commentary on the
Pentateuch), exists in manuscript. Among other minor unpublished works known to be his are , and . The fame of Gerondi chiefly rests on his moral and
ascetic works, which, it is surmised, he wrote to atone for his earlier attacks on Maimonides and to emphasize his repentance. His (), (), and belong to the standard
Jewish ethical works of the
Middle Ages and are still popular among
Orthodox Jewish scholars. was published as early as 1490, as an appendix to
Yeshu'ah ben Joseph's . The first appeared in Fano (1505) with the , while the was first published in Kraków (1586). All have been reprinted many times, separately and together, as well as numerous extracts from them; they have also been translated into
Yiddish,
Italian and
English. A part of the (sermon 3) first appeared, under the name , in
Solomon Alami's . For an estimate of Gerondi's ethical works and his partial indebtedness to the see . He is also supposed to be mentioned, under the name of "R. Jonah," five times in the . == References ==