σπεκουλάτωρ G4688
spekoulátōr · spek-oo-lat'-ore · Noun Masculine
of Latin origin; a speculator, i.e. military scout (spy or (by extension) life-guardsman):--executioner.
1 Occurrence in the King James Bible
Mark 6:27And immediately the king sent an executioner, and commanded his head to be brought: and he went and beheaded him in the prison,