the following information might be of interest to you:
There is a Abraham Jacob Oertel from Nürnberg [Nuremberg] who got a diploma of nobility on 16 March 1762. His son Carl Heinrich von Oertel was born in 1754. According to the book of nobility the von Oertels belonged to a patrician family in Nürnberg, a very ancient city in Franconia, Bavaria, Germany.
Unfortunately I cannot read your full e-mail address. So I will give you my address: Pekawebe[at]t-online.de. Please replace [at] by @.