Arioch

Arioch is a Hebrew name that means "fierce lion". It originally appears in the Book of Genesis chap. 14 as the name of the "King of Ellasar", part of the confederation of kings who did battle with the kings of Sodom and Gomorrah and with Abraham in the vale of Siddim. Earlier in the 20th century, it was common to identify him with "Eriaku" - an alternative reading of either Rim-Sin or his brother Warad-Sin, who were Elamite rulers over Larsa contemporary with Hammurabi, although this identification has come under attack from scholars in more recent years, and is now largely abandoned, in part due to Nuzu inscriptions referring to a Hurrian king named Ariukki.
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[Other] The name used for one of the fallen angels in Paradise Lost. Milton took it from Dan. ii, 14, where it is the name of the captain of the guard. The names means 'a fierce lion'.

long; great; tall
  

(venerable).
→ The king of Eliasar, one of the allies of Chedorlaomer in his expedition against his rebellious tributaries. (Genesis 14:1) (B.C. 1921-1912.)
→ The captain of Nebuchadnezzar's body-guard. (Daniel 2:14) etc.
→ Properly Eirioch, or Erioch, mentioned in Judith 1:6 as king of the Elymaeans.
  

lion-like, venerable. (1.) A king of Ellasar who was confederate with Chedorlamer (Gen. 14:1,9). The tablets recently discovered by Mr. Pinches (see CHALDEA ¯T0000758) show the true reading is Eri-Aku of Larsa. This Elamite name meant "servant of the moon-god." It was afterwards changed into Rimsin, "Have mercy, O moon-god." (2.) Dan. 2:14.