The two names that ring a bell:
Amschel sounds like the misspeling/alternative of the popular
Anshel (from the
German Anselm, I think)
Zawel sounds like a version of Saul/Sol/Shoel etc. Szawel (sha-vehw)is the Polish biblical version of the name
Saul (but only the New Testament one - ie St.
Paul, not
King Saul)
Are you familiar with the Jewish Given Names Data Base?
If not, you must try it out:
http://www2.jewishgen.org/databases/GivenNames/search.htm