A list of Jews who illegally settled in rural areas of Kozeletsk can be found on a Russian language site: http://www.surnameindex.info/docs/000107.html. The list offers surnames only. I don't know what the numbers found after the names represent.
A few of the last names are:
Barun, Belsky, Blitshteyn/Blitstein
Vikskler, Vlovik, Voyts, Vytles
Halperin/Galperin, Hoffman/Gofman, Gurai
Eyngor/Eingor/Einhor, et al
Please see the site for additional last names.