No fancy origin really. A long time ago I went by random names I made up on the spot for every single site I used. As it was getting tedious remembering those, especially for places I intended to use more often, I wanted to have a more permanent nick.
In this case, I just decided to use the first two words in my native language that came to mind at that time. Decided to cut the latter half at some point due to character limits often not accepting the full version. Nowadays I have to go with some variation of Maden every now and then because other people register with that nickname before I do.