I believe ski is a Polish suffix.. Leave Fred, their search engine is fuzzy. But for the point of departure try Rotterdam, Netherlands first, then Southhampton, England. My Polish relatives came through there. They could have travelled overland to a lot of ports. Lastly, you could try a NY port of arrival rather than Philly, unless you have documented proof from a census that they stayed around Philly.
Please use firstname.lastname@example.org