This is the place designated WORLD CIRCUS CAPITAL. They had about 2 dozen circuses quartered here.
So, a Fishman, with a J, working with a circus as.......... well, that'd probably be a Scottish or Jewish "Fishman" almost for certain.
I've ploughed the fields of the circus culture trying to find a relative or two and it's not easy ~ even though a Great Uncle was first the treasurer/bursar/accountant for Cole Brothers, and then became the owner of that organization (which continues on to a degree as a division within Ringling).
Let me guess the Fishman family in Connecticut (or New York at an earlier period) had a relative that ran off with the circus. That would result in a Fishman family in Wisconsin ~ and later internal immigration in America usually entails someone moving to where they have relatives ~ it helps out in a new start ~ so you are on the right trail, but Joelle man well not be that close a relative of Joanne. Could be she's closer to J Fishman in Wisconsin and might not even have an idea who Joelle is. Frankly, I don't begin to know my first cousin's kids and there's well over a hundred of them ~ the Fishman family appears to have been as prolific.
I did some searching. While JoAnne (Fishman) Kloppenburg’s father is Elihu Fishman, Joelle’s is named George. Joelle stated that she came from a political family.
There is an earlier Elihu. These Fishmans would be (Ukrainian) Jewish, not Scottish. My guess with Kloppenburg is that her time in Yale and Princeton led to networking with lefties in Madison.
This must be a family of some notoriety, as Morris Sweetkind, a teacher at my old CT prep school, actually wrote of the town Ukrainian Abraham Fishman emigrated from.
BTW, my own roots go to Connecticut, but I am presently near the Wisconsin border in Illinois, so I find this interesting all the way around.