A reader of this blog saw my previous post about a 7 year search that I had ended and he wrote me that he had found an almost indentical coat of arms belonging to the familie
Thillen / Tyllen
Only the heraldic colours of II and III are the other way round. And I believe my wax seal stamp shows golden lions:
Ewoud Linthorst Homan found the coat of arms in the book:
Burgerliche Wappen, Serie IV - page 94, published by Gebr. Vogt, Papiermuhle bei Roda, Sachsen - Anhalt
I now can start a new search.....