Lonski family search around Bialystok 1. Open

My great grandfather was Jan Lonski.  I know my grandmother, Teresa Lonski, married name Teresa Herman, was born in Jenki, Poland.  My great grandfather was taken away during the war as he was some type of business man I believe.  The family was fairly well off in town, and my great grandmother, Marjanna Lonski (Kozikowski) was in charge of providing permits? or some type of documents for the townspeople.  I have very little information regarding my great grandfather’s side of the family.  Any help is greatly appreciated!