To answer your question, no, I've never heard of Freddy and of Hamborger Veermaster.

But I have heard the song about California - I remember hearing it in childhood. For some reason, the state is pronounced Cal-i-FORN-eye-oh. (no EE oh, as in the video). And it should be "on the banks of THE Sacramento" because the Sacramento referred to is a river, where one looks for placer gold.

Now, is Hamborger Veermaster Dutch, German or some other language? Where does the pipe tobacco come from?