I know in Germany a lot of Nero's non Western movies were re-released and re-titled to cash in on the Django craze.
Over the years I have heard this -- well, shall we call it rumour? -- several times but I cannot think of one single film apart from the above-mentioned DSCHUNGEL DJANGO. So, yes, there were many Django retitlings in the western genre but I have serious doubts about Nero's non-western movies. Then again I have not seen as many of Nero's lesser known films as I'd like to (at least not with the German dub). If someone knows better I'd be happy to be corrected.

As far as retitled western films are concerned I added a link in the other thread, Marc.