Is it Correct?

I found this link was interesting, it is the names of Transylvania, however, it does not cite sources, but says that the Romanian names and Hungarian names are connected
Upon reading the the Saxon name, I had to pull this shield up.  Siebenburgen means in German (roughly of course) seven cities, or castles.

I can see the origin to many of the theories that the Saxons did refer to the "seven" major cities in Transylvania.