I’m from Ukraine. I found this surname mostly in Ukraine,Russia and Poland – plus in very small quantities all over the World. I also found on the Internet A Dictionary of Lemko Surnames -Lemko.org and there is two Lemkish surnames – Lytusiak/Litusiak and Lycius’ /Lycius. Regarding Central Ukraine there was internal migrations in the Middle Ages from Central Ukraine to Western Ukraine and vice versa; besides of it I’ve been told, that Pshenychnyky village located in modern Cherkassy Oblast of Ukraine (Central Ukraine) earlier had many families bearing Litus surname. What’s interesting is that this Pshenychnyky village was founded later than a village with the same name in Ivano-Frankivska Oblast of Western Ukraine.