Niko Bellic (David King) : r/PerkByDaylight

Michael Hollick, GTA Wiki

Watching Behind Enemy Lines and It Looks Like Niko Makes A Cameo : r/GTA

GTA IV's Niko and Roman Bellic Actors Call Foul Play

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

Ray Boccino GTA 4 Characters, Bio & Voice Actor (GTA IV, TLaD & TBoGT)

What If Peter Griffin Dressed Up As Niko Bellic? by Benny49 on DeviantArt

GTA HD Universe Games All Voice Actors in Camera

GTA 6 voice actors, Who is rumoured to be in the cast?

5 GTA voice actors who perfectly fit their role

GTA San Andreas voice actor for CJ rages at Rockstar Games and says he'll never work for them again and won't be in GTA VI