Ritualist; flourished about the end of the twelfth century and the beginning of the thirteenth; died about 1210 (according to "Shebeṭ Yehudah"). He was one of the five sons of Meshullam ben Jacob and seems to have written a book on Dinim, from which the author of the "Sefer Asufot" (MS. in the Montefiore College Library; see Gaster, "Judith Montefiore College Report, 1893," pp. 33 et seq.) quotes several passages. His decisions and interpretations are also referred to in the "Sefer ha-Hashlamah" of his nephew, Rabbi Meshullam (for example, in his notes on Baba Ḳamma, end of chap.; Baba Meẓi'a, beginning of chap. ), who calls him "ḥakam" for his general knowledge.
Judah ibn Tibbon, in his ethical will (ed. H. Edelman, in "The Path of Good Men"), recommends his son Samuel to seek in all things the advice of Rabbis Aaron and Asher, these being trusted friends; and he refers to Aaron's skill in computation of the calendar and in other branches of rabbinic knowledge. In the literary controversy about certain theories and decisions of Maimonides, carried on at the time by the Maimonists and Antimaimonists, Rabbi Aaron sided with the former.
Rabbi Meir ha-Levi Abulafia (
- Gross, Gallia Judaica, pp. 280, 290;
- Renan, Les Rabbins Français, pp. 448, 511, 518, 733;
- Lubetzki, preface to Sefer ha-Hashlamah, Paris, 1885;
- Michael, Or haḤayyim, No. 306.
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