Susanne: Of course you are right about the Yiddish album being by Zupfgeigenhansel. I ought to know as we hear it often enough.
Arguably "Klaus der Geiger" is his real name now Leadbelly. I had known him for many years before I ever heard the name "von Wrochen". I first heard it when I went to visit him in hospital some years ago! It's hard to convey the effect of his performances on record or television. You really have to experience him close up, where he is something of a force of nature. He can get well paid work doing gigs and sessions for famous musicians and singers. He is also quite prepared to go into the studio to play for friends. For me he is a giant.