White Russia
Reb Zalman Moishe was born in Nevel, Russia, to his father, Reb Dovber ("Berel Der Shoichet"), who was the Chabad shochet in Nevel. The surname HaYitzchoki indicated their lineage to Rashi. His mother was Rochel Zisselson, the daughter of a prominent Lubavitch family in Nevel. He married Neshe Reines of Zhembin, the Reineses were a prominent Rabbinic family in White Russia.