I have no direct info for you, but my great-grandfather Samuel Appelbaum (b. 1869) emmigrated from (supposedly) Minsk in late 1800's. Settled in St. Louis area. Had a brother, Frank. Father's name was Itsak(Isaac).
Samuel's son, Paul Appelbaum, eventually settled in Sioux City, Iowa, where he changed his name to Lewis (his step-father's). He developed a security business called the "Lewis System".
Don't know if this helps but would appreciate hearing if you know anything. Good Luck.