Obviously, this could be very exciting and welcome news. But may I ask you who you are or why you are able to state some of the facts with such certainty? I admit that I know little about the geography of Poland and have not tried accessing the archival resources Zlatica suggested. Is that where you found the information on Frank? And is your statement "Jozefa Bis and Klara Bis were sisters from Pysznica" based on any Polish records, or some other data or conjecture?
I would greatly appreciate any clarification as well as links to archival records and any other research material you used. Anyway, thank you for your note.