κῆρυξ
1. "a herald, pursuivant, marshal, public messenger", Hom., etc. In Hom. they summon the assembly, separate combatants, have charge of sacrifices, act as envoys, and their persons were sacred. After Hom., Hermes is called the κῆρυξ of the gods, Hes., etc.
2. at Athens, "a crier", who made proclamation in the public assemblies, Ar., etc.
Etym. from κηρύσσω