One doesn't usually see enquiries emanating from the point of origin - very interesting. This response may only serve to narrow your field of search. Having queried my Württemberger relations, I'm advised that our Rudolph clan of Hohenlohekreis (associated with the communities of Sindringen, Gaisbach and Künzelsau) have no evident relation to the Rudolphs of Fridingen, Schwarzwaldkreis; thus, my initial posting at this Forum should have no bearing on your research. However, I suggest that you review the postings by Jan Pierce Nottingham, Steve Clark and Betty Rudolph, as they too have a Württemberger Rudolph connexion. Good luck in your research.
P.S.: I love La Jolla (3 hrs. down the coast from me).