Back when Katarzyna lived in Poland, Lancut may have been part of the district of Lezajski. Just as we here in Oak Lawn, Orland Park, etc. identify ourselves as being from Chicago, she may have identified herself as being from Lezajski. It was only 17 miles away.

My mother's birth certificate indicates she was born in the Warsaw area, but in fact she was born in what was known as Warsaw province at the time....now identified as the Konin area.

Because the other two Posobiec shown on the Ellis Island web site show they are from a nearby village, I would have no doubt they could be related. Am not sure if it was an error, but Jan Posobiec shows he was going to Bridgeport, PA. Didn't your grandmother go to PA?

Remember, the information on a death record is only as correct as what the informant knew at the time. I shutter when I read my grandmother's death certificate....because it is not correct....it was given by her son who tried to "Americanize" everything, including her name! But, I am surprised her marriage record doesn't show her mother's maiden name. Did you view the marriage record through the records of the LDS FHL?

There are several churches in the Lancut and Lezajsk area...maybe you could try to locate records or family through them. I found none in the Wierzawice area.