Akein
From Tar Valon Library
A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Akein is Tuon's razor, given to her as a present by Mat. The name means "Swallow" in the Old Tongue. Dice in Mat's head stop rolling when he tells Tuon it is hers.
(Reference Knife of Dreams, Chapter 8)
