Abraham ben Nathan

Abraham ben Nathan (Hebrew: אברהם בן נתן‎‎‎) was a Provençal rabbi and scholar born in the second half of the 12th century, probably at Lunel, Languedoc, where he also received his education. It is for this reason that he is sometimes also called הירחי‎ HaYarḥi "of Lunel" since Hebrew "yareaḥ" is the equivalent of the French word lune "moon'.

In Lunel, Abraham may have studied under Abraham ben David, but his regular rabbinical studies, were pursued at Dampierre, Aube in northern France at the academy of Isaac ben Samuel. Abraham subsequently left his birthplace, and, after much traveling, finally settled in Toledo, Spain in 1204, where his learning quickly gained for him the favor of the rich and learned Joseph ibn Shushan and that of his sons, Solomon and Isaac. To these patrons he dedicated his seminal work, Sefer Ha-Manhig (The Guide), or as the author called it, Manhig 'Olam, which he began in 1204 and completed some years later. In its present form the book consists of two distinct portions, the first of which comprises a collection of responsa, compiled from his numerous written and oral decisions, some of the former of which still bear the usual epistolary conclusion: "Shalom! A. B. N." (Greeting! Abraham ben Nathan). The second part contains extracts from the halakhic works of Isaac Alfasi, Isaac ibn Ghiyyat and Isaac ben Abba Mari, a relative of Abraham's.

...
Wikipedia