If you locate any connection between Lodz birthplace and your search name, our parents Anna Iglicka Rzezak Siegel and Israel Rzezak Siegel were from Lodz and immigrated to USA aboard the Marine Perch in 1946.  Israel was born in 1905 in Lodz, and his family that he descended from lived there long before that.  Anna was born in Lodz and also had many generations there.  They lost most of their family to invasion in Lodz by Nazis.  I will be on the look out for Gerszonowic and Szerpansk as I continue my search, too. Best to you, 
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Sharon E. Siegel 
Port Jervis, NY USA