Might anyone be researching the Lohse & Garnitz families whose last residence listed on the ship's manifest in 1881 was Koskau?

August Lohse 48, Wilhelm 22, Wilhelmine 24, Caroline 14, and Friedrich 1 Left 27 May 1881 from Liverpool, England. Arrived in New York City, Castle Garden aboard on the ship City of Montreal, on Jun 22, 1881. (There is no listing for August’s wife Caroline (Garnitz) Lohse. Caroline apparently died before August and his children sailed to the U.S. in 1881.

Their destination was New York, but shortly after their arrival settled in Milwaukee Wisconsin. I have further information on Wilhelmine and Caroline, who married in Milwaukee, but not Friederich and Wilhelm. Any insight would be greatly appreciated.

Thank you,
Marv