I have in my possession a family tree originating with Frank Kaps (1823) and Katharina Lindenfelser Kaps(1848), who had six children; Ed, Alois, Rosalie, Julia, Mamie and Joseph Kaps. Joseph and his wife, Martha Mosher sired 13 children, one of whom was Frank Kaps, my great-grandfather.
Seems like a fairly solid match to me. I'm afraid I cannot trace the Kaps family back any further than Frank and Katharina, although I do know they both came from Baden Germany. Unfortunately, Frank Kaps of Baden was orphaned at a young age, conscripted into the German Army at the compulsory age and emigrated to America at an unknown year.
I have some more information available if there is anything else you would care to know.