Not much known at all 1. Open

Well, my grandfather is the product of what we were told, Lithuanian parents. Only 1 of his siblings where born in country(maybe). Im slowly finding out they may have been from Poland instead. His surname is Madej, and I can’t find anything on the name. Debating a DNA test. Ive learned that Madej was actually a river community that immigrants where named after when they came over to the USA. Im trying to track down anything paper wise of where they came in from. They landed in Boston n stayed in the area. I guess any information is kindly taken.