Germany or Deutschland?

This leads me back to the same thing, Japan or Nippon/Nihon? Germany or Deutschland? In Japanese, we refer to Germany as Deutschland. Just as probably everybody else. So where does these labels come from? Are they of English origin? I've researched some of these questions, but everything I find seems to be inconclusive as to where the word Japan came from. I just thought of Germany recently, so I haven't looked into that yet.