Yes, in game characters.
Didn't know that, hasn't been telling you this.
Because I prefer to keep things simple and am not beholding to a ream of paper to describe a black carpenter ant. It actually says more about people who get impatient and upset at these kinds of questions and demanding this kind of level of details than the person who asks it.
So let's say a member of your party is named Julian Chase. Along the way you get in the habit of calling him Chase.
He doesn't like it. He gets really upset with you. Then one day he shoves you against a wall and puts a dagger to your throat and says:
"Stop calling me that. In my culture it is considered extremely rude to call somebody by their last name, and only close friends are allowed to do so. You have not earned my friendship yet, so call me by my first name."
So, do you show him respect and back down and not call him by his last name or do you threaten him in someway and not show him any respect at all and risk never earning his friendship?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.