Italian rabbi; flourished at Rome in the eleventh century; nephew of Nathan b. Jehiel, the author of the "'Aruk." About a quarter of a century after Nathan's death Solomon was a member of the rabbinate of Rome, of which he was for some time president. He was, besides, the chief of Nathan's high school ("Shibbole ha-Leḳeṭ," part , No. 56). His authority in rabbinics is seen in the fact that he is quoted in the work just mentioned (part , No. 128), in a responsum to a question as to why the Eighteen Benedictions (Shemoneh 'Esreh) are not recited on Sabbaths and holy days. He repeatedly answered questions of Menahem b. Solomon b. Isaac (ib. part , Nos. 56, 57, 75 [No. 75 being in connection with the benediction recited at a marriage ceremony]). Besides these responsa there is extant one which was sent by the rabbinate of Rome to the community of Paris (published by S. D. Luzzatto in "Bet ha-Oẓar," 1:59a et seq.), and the first signature to which is that of Solomon, as president.