thank you for your message. I have no doubt that your ancestor George Killinger is Johann Georg Killinger, born 25 Feb 1809 in Steinreinach, Wuerttemberg/Germany. He came with his parents Johann Georg Killinger married to Christina Margaretha Haufler with the ship "Massasoit" to America and arrived on 30 Sep 1820 at Baltimore.
He married on 10 Dec 1830 in Stark County/Ohio Catherine Blatner. His siblings Margaret and Gottlieb married in Stark Co. as well.
If you want, I can give you Johann Georg Killinger's ancestors in Germany back to the beginning of the 16th century.
This family obviously is not related to the Killingers I mentioned in NC. But if you can do research in NC for me, this would be highly appreciated.