I checked my tree the Koebel's I have in my tree were at Oberseebach, Alsace in the early 1700's. Do you know if your Koebel's were in the area you are researching back then??? If not maybe send me a few names and dates on the ones that you are researching the earliest ones you have will be the best. I will email a contact of mine in Oberseebach (Seebach), Alsace maybe your bunch came from there or maybe the ones here came from where you are looking. I can send you a few names also.