ישעיה בן מאלי הזקן דטראני – Rabbi Isaiah di Trani ben Mali, also called Trani The Elder or the Ri”d. 12-13th century Italian talmudist famed for his near-entire commentary on the Talmud, including tosafot and chidushim.
Read more in the Jewish Encyclopedia.
Synonyms:
R"id,Rid