Strong's #746: 'Aryowk (pronounced ar-yoke')
 of foreign origin; Arjok, the name of two Babylonians:--Arioch.
Brown-Driver-Briggs Hebrew Lexicon:
 
  'ăryôk 
 
 Arioch = "lion-like" 
 1) the ancient king of Ellasar, ally of Chedorlaomer
 2) the chief of the executioners for Nebuchadnezzar
 
  Part of Speech: noun proper masculine
Relation: of foreign origin
Usage:
This word is used 7 times:
Genesis 14:1: "of Amraphel king of Shinar,  Arioch king of Ellasar, Chedorlaomer king"
Genesis 14:9: "and Amraphel king of Shinar,  and Arioch king of Ellasar; four kings"
Daniel 2:14: "answered with counsel and wisdom  to Arioch the captain of the king's guard,"
Daniel 2:15: "He answered and said  to Arioch the king's captain,"
Daniel 2:15: "is the decree so hasty from the king? Then  Arioch made the thing known"
Daniel 2:24: "Therefore Daniel went in unto  Arioch, the king"
Daniel 2:25: "Then  Arioch brought in Daniel before in haste, and said"