According to most records, the THIELKE family (Henry & Marie and their children) emigrated from Germany to America in about 1854 when Johann was only 11. Census records show this date along with the fact that Charles “Fritz” THIELKE was born in Germany in 1854 and the next child, Herman, was born in Wisconsin in 1856.
I have yet to find the actual passenger record of this trip, though the THIELKE name can be spelled many different ways.