There is a possibility that your surname might be shortened from Neftelberger. My great grandfather came from Austria/Germany. They were from the Jewish faith. I don't have first names but can get them from my grandfather. From my understanding. The 4 youngest neftelbergers where raised by a family that live across the street from them called the O'Briens (In NYC) ..this is how my grandfather's name changed as well as his faith.