רשב”א – ר’ שלמה בן אברהם אבן אדרת – R. Shelomo b. Avraham Ibn Adret – c. 1235 to c. 1310 in Barcelona (in the region of Catalunya in northeastern Iberia), was a major Sefardi posek (decisor) and respected scholar, and the successor of Ramban, with whom he studied, although his principal teacher was Rabbenu…