I've looked over the Interface/Options menu multiple times and honestly think there's not an option that enables/disables this unless I overlooked it every single time.
It's not something influencing the gameplay, but it's something I find annoying, not being able to read the actual names in the character portrait.
This is what it looks like ingame

Wether I target myself, allies, friendly npcs or hostile npcs it just displays "..." in the portrait frame.
Sorry for sounding whiny about this, just wondering if somebody else has encountered this and perhaps has a solution for it.