Where was Jacob Kucher born? Do you know if he came from Wuerttemberg, Germany? That is where all the Kuchers in my wife's line are from. She has just about finished compiling all the Kuchers and related families from the Familienbuecher and Kirchenbuecher from the towns of Grossbottwar and Beilstein (~1619-1875), both north of Stuttgart. You can find it posted at the following URL:
There are quite a few individuals named Jacob, Jakob, and Johann Jacob (Jakob), but none, I believe with the birth date you gave. Also, I don't think that there are any Peters. I'll probably be making one more update to this site sometime soon.