Moshe Ephraim Zalman Schorr

In the Chronicles of the Shor Family, H D Friedberg states that the first descendant of R"J Behor Shor that was known to him was R'Hiam Shor, who lived at the beginning of the third century of the current millenium (appx 1440-1480); lived in Moravia (Maharin?) and was the father of R'Moshe Efraim Zalman Shor who was born at the end of the third century (appx 1520-1540).

R'Moshe is the first reasonably well defined ancestor of this distinguished branch of the Shor family. He is said to be a descendent of R'Yosef Behor Shor, tosafist of Orleans, N France; lived in Moravia (Maharin?), Ashkenaz and Alsace in 16th c (1540-1640) ... reasonably well defined because there is still a great deal of controversy surrounding him:

In the book Ancient Jewish Families by J L Shapiro, the ancestors of R'Moshe Efraim Zalman Shor are listed as R'Haim son of R'Avraham, Son of R'Shmuel Shor who was a descendent of R"J Behor Shor.

According to R'Meir Wunder (Elef Margoliot) R'Moshe was the son of R'Haim Shor, a descendent of R"Y Behor Shor; he married the daughter of R'Peretz (Shapira) of Krakow, the grandson of R'Peretz ABD of Kosnitz (in principality of Baden, Ashkenaz), the son of R'Shlomo Speyer Shapira ABD Heilbrun & Landau, the grandson of R'Matityahu Treves whose Ancestry can be traced to Rashi.

R"Y Levenstein (HaEshkol v'Ha Peless) claims R'Moshe was the son of R'Avraham of Meharin, the grandson of R'Avraham, son of R'Shmuel Shor of Posna, who was a descendent of R"J Behor Shor. He married M'Hana, daughter of R'Naftali Hertz Treves, aka R'Hertz Hazan, who was physician to the king of Poland and ABD of Krakow and of Lublin (died in Lublin in AM 5331, 1571 CE).

J"L Shapiro (Mishpahot Atikot b'Isroel) states that R'Moshe was the son of R'Haim, son of R'Avraham, son of R'Shmuel Shor, who was descended from R"Y Behor Shor. He was married to Hava, daughter of R'Naftali Hertz Treves (ABD and Warden in Frankfort am Main) who was also a descendent of R'Matityahu Treves (Hava died in 1571).

The latter marriage seems quite likely, in that son Naftali Zvi-Hersh would have been named for his grandfather.