My Dad was Lawrence Kroha, his father John Joseph Kroha also from Milwaukee. His father was a butcher in Milwaukee and his grandmother mother was Margaret Hagner. I have her holy card which lists her life span as 1856-1940, My brother and family visited a small city in the Chech Republic which is supposed to be the home of the Krohas. We were always told that they were gamekeepers for the Austro Hungarian Royal family. and that they came to America to avoid conscription under Bismark.
I am just getting into this geneolgy search and find it fascinating. In doins do I am amazed at the number of Kroha's in the US