Jacob ben Gerson Bak "Wahl"

46 Jacob (Back Mechokek) bn Gershon Wahl zTs”l, age 45 1618

Son of Gerson. Printer; died in 1618. In 1595 he published at Verona the Midrash Tanḥuma, with an elaborately embellished title-page. After 1605 he was engaged in printing at Prague. His first work published there (1605) was the "Sabbat-Yoẓerot," based upon the Polish ritual and written in the Judæo-German dialect. Until 1615 he was occasionally associated with Jacob Stabnitz. Jacob left two sons, Joseph and Judah.

Back Family:

A family of Hebrew printers in Italy and Prague, who exercised their craft for two centuries. The name is said to be an abbreviation of "Bene Ḳedoshem" (Children of the Martyrs of Worms).

http://www.yivoencyclopedia.org/article.aspx/Bak_Family