Sergej Ćetković is a Montenegrin singer. He lives and works in the Serbian capital of Belgrade. Ćetković represented Montenegro in the Eurovision Song Contest 2014.
Also used in Slovakia. Slovak pronunciation is "ser-GAY".Famous bearer: First Lt. Sergej Kopriva, character from the TV crime show "Mesto tieňov". He played by Ladislav Hrušovský.
-https://sl.m.wikipedia.org/wiki/Sergej
-https://www.behindthename.com/name/sergej/top/slovenia [noted -ed]