A Footnote About His Life
The book Founder of Hasidism: The Quest for the Historical Baal Shem Tov notes:
"Several of these individuals who appear in Shivchei Ha-Besht also are listed on these annual inventories, many of which have survived in the archives. They are also found on the copy of the 1763 census of Polish Jewry. The individuals named are Hersh, the Besht's son; his daughter, Edel; Yechiel, the Besht's son-in-law..."
In the footnotes to this book it notes that in the 1763 census the Degel Machaneh Ephraim "is also listed as Froim together with his wife Jetel.
This name "Jetel", however, conflicts with information in Glen Dynner's book "Men of Silk", in which he wrote, "R. Moses Hayyim Ephraim was matched with Esther, daughter of Gershon of Kuty, the Besht's brother-in-law. One of their children, Ethel, married David Horowitz, of another aristocratic family." Since the name "Jetel" appears in the 1763 census, I tend to think that this information from "Men of Silk" is inaccurate since the source of this information is not provided in Dynner's book. Additionally, in Degel Machaneh Ephraim, Parshas Bereishis, the Degel refers to R' Gershon Kitover as "Dodi Zekeini" ("my great uncle"), not as his father-in-law.
It is extremely interesting to finally learn the name of the Degel's wife. Given the fact that the Degel was born in 1748, this would mean that he was 15 years-old or younger at the time of his marriage. To date, I have only heard this story about the Degel's wife and I would be interested to learn more information about her background.