Surname TAJWIJ #names

Karol Swanson

I just discovered my great grandfather's surname was TAJWIL and the name appears on the JRI list of Rozdal surnames 1869-1901.  Can anyone please tell me how to pronounce this name? Is it Yiddish, Polish, Russian or whatever? Would there be an English or Yiddish equivalent of this name?
Also, I have two different first name versions for, what I believe, is the same person.  One is spelled Uszer and the other is Vicher. Could this be the same name?

Many thanks,
Karol Schlosser Swanson

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