He was a teacher and worked as a landscape gardener on a large estate. He emigrated to the U.S., arriving at the port of Baltimore, Maryland on or about the month of June 1871. Alwine was born 3 April 1849 at Gegersburg, Kreis Czarnikau, Regierungsbezik Bromberg, Germany. They settled in Oconto County, Wisconsin. Johann was a musician who was succeeded in his position at St. Thomas by Johann Sebastian Bach.
Any information is very much appreciated.
I cannot speak or translate German. A Kreis roughly equals a County and a Regierungsbezik is equivalent to an administrative area. You should probably start with a search of the Hamburg Ship Passenger Records for 1872. A 4 page summary of this two step process is available from any Family History Center. If this does not prove to be useful, then search the Die Ahnenstammkartei des Deutschen Volkes .