Ephraim Zalman Margulies (sometimes transcribed as Margolis) (19 December 1762 – 24 August 1828) (Hebrew: אפרים זלמן בן מנחם מאניש מרגליות) was a Galician rabbi born in Brody, brother of Chaim Mordechai Margulies.
He received his Talmudic education at different yeshivas, in which he distinguished himself for the acuteness of his intellect and for his astonishing memory. His correspondence with Ezekiel Landau and other leading Talmudists soon gained for him a high reputation. He established a banking-house which proved so successful that within a short time he became quite wealthy. In 1785 he published his responsa entitled Bet Hadash ha-Hadashot, and in the following year the rabbis of Brody elected him one of their number. Being of independent means, he opened in his house a yeshivah of which he was the head; several of his pupils became eminent rabbis.
Bet Efrayim (4 parts, ib. 1818), responsa on the four parts of the Shulchan 'Arukh
Yad Efrayim (Dubno, 1820), commentaries on Shulchan Arukh, Orach Chayim
Sha'are Efrayim (ib. 1820), on the rules pertaining to the reading of the Law
Yad Efrayim (Zolkiev, 1823), extensive commentaries on the names of men and of women to be employed in letters of divorce
Shem Efrayim (Berdychev, 1826), commentary on the Torah
Matteh Efrayim (Zolkiev, 1834), on the ritual laws to be observed from the beginning of the month of Elul until after the Feast of Tabernacles, as well as on the regulations regarding the Kaddish of orphans
Zera' Efrayim (Lemberg, 1853), commentary on the Pesikta Rabbati
Safah Ne’emanah (Budapest, 1929[1]), responsum on whether it is permitted to pray in the vernacular
Many other works by him are still in manuscript (as of 1906).
^Even though the year 5689 includes 1928, on page 7 the introduction is dated as being written in Tammuz 5689. Therefore, it could not have been printed in 1928.