Your welcome. I sort of doubt that anyone could have just come to America without passing thru an immigration office station. I only suggest Ellis Island as that is a wonderfull tool for information. If your ancestor does not show up on the EI that means that it is possible that the name is / was transcribed wrong. Another possibility is that your ancestor passed thru Baltimore, Boston, Philadelphia, Galveston or even thru Canada port.
Romania does not border Slovak Republic.(present time) Starina and Stakcin would be closer to Poland and Ukraine. Ukraine and Hungary borders Romania. http://mapy.atlas.skhttp://mapy.atlas.skfor locating a town in SK
Surname CSILLAG shows up in city of Bucuresti, Romania phone book. www.whitepages.ro The name CSILLAG also shows up in very good numbers in Hungary. www.matav.hu/tudakozo