Hi Cliff,

I found you question interesting, and while searching for some info on the subject I found this book (I have not read it.)
Confessions of the Shtetl. Converts from Judaism in Imperial Russia, 1817-1906 by Ellie R. Schainker
This site has a detailed commentary on the book, which on its own is interesting.
https://www.europenowjournal.org/2017/08/01/confessions-of-the-shtetl-converts-from-judaism-in-imperial-russia-1817-1906/

Hope this helps,

Sherri Bobish