I'm a little embarrassed to post this, but here goes nothing. A friend of mine is interested in genealogy and is researching the Hungarian name "Cziko". Cut to the chase, could that name be from Jewish Hungarians? I know the question is odd, but he doesn't really have any way to research it, and neither of us speak Hungarian, so I promised to post this to maybe get a bit further. Thanks for tips and/or info about sites to research this.