person · P0501 · geonim
Rav Acha of Shabcha רב אחא משבחא
The She'iltot's author — the first named author of the Oral Torah after the Talmud's sealing, and the great might-have-been of the Pumbedita gaonate. When the exilarch set Rav Natroi Kahana (Rav Natroi Kahana bar Ahnai) over him, he left Bavel for Eretz Yisrael and never held the office; the tradition kept the honorific anyway, printing his book forever as Rav Achai Gaon's.
Who
- Hebrew
- רב אחא משבחא
- Also known as
- Rav Achai Gaon, Achai of Shabcha, Rav Acha (Achai) of Shabcha
- Era
- geonim
- Received the mesorah from
- Academy of Pumbedita
When
- Traditional
- leading scholar of Pumbedita's circle; went up to Eretz Yisrael in the days of Rav Natroi Kahana, c. 4510s AM, and died there
- Civil (computed)
- 4500–4520 AM · 740–760 CE
- Academic
- fl. c. 750 CE; departure for Eretz Yisrael c. 752–753, death date unknown
- Lifespan (traditional)
- ≈20 years
- Precision
- approximate
Where
- Places
- Pumbedita
How do we know
| Claim | Evidence | Confidence | Sources |
|---|---|---|---|
| The Iggeret records his moment inside the Pumbedita succession: in the days of Rav Natroi Kahana bar Ahnai, "Mar Rav Acha of Shabcha went up to the Land of Israel... and when the nasi appointed him [Natroi] over him, he went up there" — the tradition's account of how the She'iltot's author was passed over for the gaonate and left Bavel.
Verified verbatim. The clause "דמר רב נטרוי שמעיה הוה" is read both ways: Sefaria's translation makes Rav Acha the attendant (shamia) of Rav Natroi, while ibn Daud and the standard historiography make Natronai the attendant appointed over the master (so She'iltot DeRav Achai's account). The passed-over-and-departed core is common to both readings; no personal reception edge to Rav Natroi Kahana bar Ahnai is drawn while the direction of the shamia relation is disputed. The corporate reception edge to Pumbedita (Academy of Pumbedita) rests on this episode itself — on either reading his formation and standing were inside the Pumbedita academy's circle.
|
tradition | ★★★★☆ | |
| Sefer HaKabbalah tells it without ambiguity: Rav Acha of Shabcha, whose She'iltot "unto this day is not found to contain any error," was not made gaon "because of the hatred borne to him by the exilarch," who ordained Rav Acha's own attendant Rav Natronai instead — and Rav Acha departed in anger for Eretz Yisrael, where he died.
Ibn Daud writes three centuries later and his geonic datings are elsewhere confused (see Shimon Kayyara); his account is entered as the tradition's settled telling, not as independent evidence.
|
tradition | ★★★☆☆ |
|
| He is generally reckoned the first post-talmudic scholar to transmit a book under his own name: the She'iltot (She'iltot DeRav Achai), c. 750 CE, carries his authorship edge in this atlas. The "Gaon" of the printed title is honorific — he never held the office, which is the point of his story. | tradition reconstruction | ★★★★☆ |
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