Yoav,

I would think that Grodnek would be Grodny in Belarus. If not,
there is a Gorodnok now Horodnok about 23 kilometers west of Lviv.
Also a Girnyk north of Lviv and just south of Sokol.

Ron Cutler

Searching: KOTLYAR, DINITZ, SCHWARTZ, ROTHMAN, GALITSKY, GOLDBERG,
KRASNOFF, ZOLORATOV. Kamenets-Podolsk, Khotin, Kirovohrad.