Niko Bellic - Saints Row: The Third

Exploring the Making of GTA 4's Story: A Look at Rockstar's Approach to Crafting a Masterpiece - Softonic

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

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

Niko Bellic - Grand Theft Wiki, the GTA wiki

Niko voice actor earned only $100,000

Roman Bellic is a TRAITOR & REAL REASON He Never Returned in GTA 5

They made Niko Bellic in real life 😯 : r/GTA

I really hope niko make an appearance in GTA VI, I'm not sure how they'll implant it, but it'll be cool for the nostalgia : r/GTA

Peter Griffin as Niko Bellic by Benny49 on DeviantArt

Patrick McReary GTA 4 Characters, Bio & Voice Actor (GTA IV, TLaD & TBoGT)