Ahh, my name. First off, for reference, Sauerkraut is, I believe, a well-known German dish involving cabbage, or is a type of cabbage, I can't quite remember.
Anyways, I'm a big WW2 buff, especially with the Germans (Though not the Nazis, just the regular guy, the average Hans). Germans were often given the nickname 'Kraut' as a reference to sauerkraut. But, of course, if I just used Kraut then people might think I'm German so I instead opted for Sauerkraut. Nice and simple, ja!