Joseph Ehlinger came to U.S. in 1833. That would make a large age difference if they were brothers. He lived in Bitschwiller-Haut-Rhin. I have been looking on internet site for Bitschwiller and found that in 1965 two persons with that last name ran for political office in the town. I want to look further into it to see if there are still people with that name living there.
Thanks for getting back to me so promptly. We may end up stubbling on a connection somewhere!