Sorcery in a World of Desire
From the introduction:
How are you called?
If you have three or four companions, give each other the name by which you are called. A namedealer knows to never give a real name to any but those whom they trust by treaty, such as this one.
If you play with but one companion, one of you must choose your name. The other knows the will of all of the names of the world that beset, seduce, serve, befriend, and coerce the namedealer.