Smith’s Bible Dictionary

“Cherethites ” means executioners

Cherethites : and of King David. (2 Samuel 8:18; 15:18; 20:7,23; 1 Kings 1:38,44; 1 Chronicles 18:17) It is plain that these royal guards were employed as executioners., (2 Kings 11:4) and as couriers, (1 Kings 14:27) But it has been conjectured that they may have been foreign mercenaries, and therefore probably Philistines, of which name Pelethites may be only another form.