Tom, My own lame suggestions: Get the United States church records for your Sebastian brothers. Did either of them marry in the United States? I know from experience that U. S. Catholic records can be very good. My great grandfather married in WI. His civil record for the event only said "Bavaria". His church record gave me the actual town in Bavaria, Pfarrkirchen, along with the Bavarian town for his wife. The LDS has filmed many us Catholic church records. Also the Archdiocese overseeing the area where your family attended church usually also has copies of the films and at least mine did the Latin translation for me as well. You said that he has a tombstone. There are various tricks and tips on the Internet for reading worn tombstones, some quite ingenious. What church held his burial service? Might they have kept records of his service which might include his place of origin? Did he have children who married in a US church? The children's civil and church marriage records often include the names of the parents and sometimes the origin of the parents. You had that other suggestion which showed a Name search on the LDS website. You can also do a Place search for any locations to see what records, civil and church have been filmed by LDS. This would include Bavaria AND Louisville, KY. That's about all I can think of right now. Best of luck, Joanne