Honestly, that looks to me like it's a generic name that SE put in there to make them seem more "realistic". I somehow doubt that it's an actual retainer running around.....
On another note. I had no idea this was even a thing. I find random NPCs all the time when I wander around, but I suppose I should be looking for the retainer ones. Maybe we should turn this into a "roaming retainer sightings guide"......
