Hi again DeLoris,
I just read the portion of the letter from Herbert Iwann that explains the duel. Did you ever find the rest of the letter?
Anyway, just for clarification isn't there two distinct lines of Iwan's? One from Russia/Prussia/Germany that may have been Iwann and one from Poland that was Iwaninski and dropped the "inski"? Or at some point did the two actually become the same one?
Thanks,
Fiona