Months later: Oops! Anna Rosina was not a HESCH; her birth name was Anna Rosina SCHULTZ, we're pretty sure. Still, this post is an example of how we investigate...just so ya know ☺.
She was born in 1833, in "Germany", according to American census records, and he was born in 1831 in Groditz, Schleisen, Prussia.
Most of their children were born in Prussia. The family emmigrated in 1873.
We have a picture of them, found at the Morrison County Historical Society Weyerhauser Museum:
It must have been the prayer card printed when Johann died in 1909. The line up to the right from her name there said "Nee: Anna Rosina Hesch" on the original copy in the museum, but I wanted you to be able to read it so I copied and pasted this section.
The other picture on the page I found at Weyerhauser was this:
The interesting thing is--who was she? The family we're researching from Bohemia had no Anna Rosina (which would be a stretch, anyway), and the prayer card says they were both born in "Germana". Still, Prussia at the time was German territory, so we can probably assume her family came from near his in Silesia.
But that means there were more Hesch families than we know about. It's possible, too, that she wasn't a Hesch...that somehow, her birth name got mixed-up...but that's even more speculation...
Actually, I'm hoping some reader here will know definitively. Leave a comment if you do, ok?