RuskykhUkrainian, Russian (Ukrainianized) Means "a Russian", from Ukrainian руський (rus'kyy) "Russian". It can also derived from the Russian word русский (russkiy), with the same meaning.
RybakPolish, Russian, Belarusian, Ukrainian, Jewish Means "fisherman" in some Slavic languages. Derived from the word ryba "fish". A famous bearer is Byelarusian-Norwegian artist Alexander Rybak (b. 1986) who won the Eurovision Song Contest in 2009.
SemakUkrainian, Russian East Slavic surname derived from a Slavic root meaning "seven". This was used as a nickname for someone who was associated with this number and was mainly given to the seventh child.
ShalakUkrainian (Rare), Polish (Rare, Expatriate) Probably from an old Ukrainian word or borrowed from old Polish ślak, variant of szlak, meaning "path, trail, route, way". Also an alternate spelling of Polish Szalak, used as a Cyrillic transliteration or foreign adaptation.
ShariyUkrainian, Russian Last name of Anatoly Shariy, the leader of Party of Shariy, a Ukrainian political party that was shut down due to alleged ties to Russia.
SheptitskiyUkrainian This indicates familial origin with the village of Sheptychi in Ukraine, which, as of February 2017, is located within Sambir Raion in the Lviv Oblast.
SlabkoUkrainian From Ukrainian слабкий (slabkyy), meaning "weak".
SletaRussian, Ukrainian Derived from Russian слёта (slyota) or Ukrainian слета (sleta), both meaning meaning "meeting".
SlobodyanUkrainian Means "person who live in a sloboda". A sloboda (слобода) is type of settlement in old Slavic countries that usually was used by cossacks for colonisation. It comes from the word свобода (svoboda) "freedom".
SorokaUkrainian, Jewish From the nickname Soroka meaning "magpie", which indicates a thievish person or a person with a white streak of hair among black hair.
TravchukUkrainian Either from Ukrainian трава (trava) "grass" or травень (traven') "May (month)", both ultimately deriving from Old Slavic трѣва (trěva) "grass".