Fränkel exercised a great influence as teacher over Moses Mendelssohn, who followed him to the Prussian capital.
It was Fränkel who introduced Mendelssohn to Maimonides' Moreh Nevuchim, and it was he, too, who befriended his poor disciple, procuring for him free lodging and a few days' board every week in the house of Hayyim Bamberger.
His grandson was Jonah Frankel, the German Jewish businessman, banker and philanthropist.
He gave a great impetus to the study of this work by his Korban ha-Edah ("The Communal Sacrifice"),[1] a commentary in three parts.
[2] His additional notes on the Jerusalem Talmud and on Maimonides were published, together with the preceding work, under the title Shirei Korban (Dessau, 1743).