Marko

Marko is mentioned in a note titled "Dead end" found on a wastelander's corpse directly north of the MDPL-21 power station.

Background
According to the note, Marko killed the author's family in front of his eyes and let the author live, who then started tracking Marko, seeking revenge.

Appearances
Marko is mentioned only in Fallout 3.

Марко (Fallout 3)