If they were from the Baltic area, they may have been listed as being from Prussia.
Yes, that helps alot. My father said my grandfather called himself a Prussian and Polish. Would that be a correct take. I think grandfather came over about 1894 or there abouts. Plus, just before my father died, he told me someone on his father's side came from Lithuania. Sadly, just stories, I have no documents or proof...yet! :)