This is confusing, because from your explanation my great-great grandfather should be Martin, but his name was Mike. From my investigation, Michael Oszust had three sons, Nicolaus, Antoni, and Johannes. His son, Nick, settled in Cambria, PA and had my grandfather Edward with his wife, Katherine nee Stronski. Edward moved to Brooklyn and had my mom, Michelle, with his wife, Ann nee Kobal.
Based on other people's family records, it looks like Michael Oszust's parents were named Ivan and Petronella nee Kanska.
Perhaps I'm a descendant of a cousin of the three brothers?