It would be helpful if you could say where Gysler/Bowser marriage took place. There are 39 Gysler families still in Germany, a branch of the Gysler's in Norway and several Gysler families throughout Canada.
The Norwegian side came to the U.S. in the 1850's. Settled in Chicago and fought in the 15th Wisconsin in the Civil War. Moved to Minnesota after and then to Sask., Canada.