My father's Kalmanowitz family was from Lyubcha. Do you have any Kalmanowitz's or Solomons in your family tree? Has anyone in your family done a DNA test (I'm on 23andme, and FTDNA, and have uploaded data to Gedmatch and MyHeritage. My sister Nadine has done Ancestry's DNA test.
Good luck in your research.
Karen Calmon Lukeman
KALMANOWITZ (Lyubcha and towns near Grodno, Vilna and Minsk)
GOLDSMITH (Bakshty and Ivje)