Genealogy / Can't find on Ellis, not naturalized, never applied for SS, how can I trace him? [7]

Can't find where my Grandmother's family came from in Poland. Trying to trace her only brother, but with no luck at all. Can't find him on Ellis Island site, he never naturalized or applied for S.Secruity. Looking to trace his parent's names and the village he and his sisters immigrated from around 1908.

Where else could I poss. find this info?
Thanks, Maria