Niko Bellic (art by me) : r/gaming

Grand Theft Auto IV - Wikipedia

Voiced Actor (Niko Bellic) addon - S.T.A.L.K.E.R. Anomaly mod for S.T.A.L.K.E.R.: Call of Pripyat - ModDB

Characters and Voice Actors - Grand Theft Auto IV

GTA4 Actor Decries Voiceover Equity

An old Tweet but I thought it'd be interesting to share nonetheless. Niko's voice actor confirming that he's Serbian : r/GTAIV

Grand Theft Auto 5,' Niko Bellic Returns

The Voice behind Niko Bellic from Grand Theft Auto IV

Bledar Morina GTA 4 Characters, Bio & Voice Actor (GTA IV, TLaD & TBoGT)

GTA 5 - NIKO BELLIC in LS #6 Niko meets Franklin

Steam Workshop::GTA- Niko Bellic voicepack