My great great grandparents are Ludwig and Amelia. I found an old photo album (with no photo) with the name Robert Emmett McNally. I don't know what relation he is to Mary McNally Scheele.
I searched for Robert Emmett McNally on the familysearch.org. There are lots of results showing different dates of birth and places of residence in USA.
You will have to decide which Robert is the best fit for your family tree.