Name Magic (Various)

Name Magic or True Name Magic is found in several fictional works, including the Wizard of Earthsea series by Ursula K. LeGuin, the Kingkiller Chronicle by Patrick Rothfuss, and in the Dungeons and Dragons 3.5 edition source book.

In this system of magic, the wielder must learn the true name of a person, object, concept etc. and then can use that name to control, manipulate, reshape or otherwise influence the named. In the Kingkiller Chronicle this type of magic is called Naming

Often true names are based on or contained in an ancient language. In Wizard of Earthsea it is Old Speech