Mordecai Samuel ben Benzion Aryeh Ghirondi (Hebrew: מרדכי שמואל בן בן־ציון אריה גירונדי; October 1799 – January 4, 1852) was an Italian Jewish author and Chief Rabbi of Padua.

[2] Ghirondi was an avid bibliophile, and parts of his book collection are now in the Montefiore Library in Jews' College in London and the Jewish Theological Seminary in New York.

[1] Among his publications were Tokho ratzuf ahavah, a work on ethics produced when he was only sixteen years old (Pisa, 1818), and Ma'amar keriyyat ha-borot, a treatise on artesian wells, showing references to them in the Talmud (printed in I. S. Reggio's Iggerot yosher, Vienna, 1834).

His most important work, Toledot gedole Yisrael, is a biographical and bibliographical dictionary of Italian rabbis and secular scholars.

[3] The latter also wrote Kevutzat kesef, responsa, in two parts, and Likkute shoshannim, novellæ, in two volumes (both unpublished).