Jancik is Yanchik in USA. And there is also many other spellings of it. My ancestors were from Jakubany, Slovakia. They are in Pa now. My mother was a Jancik and her father was Stephan and mother Katerina Hudik.
If your heritage is from this village, there is a internet site for it, just key in Jakubany, Slovakia. We are having a reunion in Mercer, PA for all decendants, it will be in September. My cousins also married a Jancik from the surrounding are in Slovakia. I have done much research in Slovakia.
Good Luck in your research.