Walter and Jennie were my great-grandparents. If you have found anything out, please let me know! I have been unable to find anything on Walter.
I have found Jennie's manifest sheet, which lists Dluga, Russia as where she immigrated from.
Długa is pronounced dwuga. It is a prefix in Polish for "long". Ive seen that there are a few villages in Poland with this prefix.
Thank you!