"The oak or heap of Assyria, a territory in Asia of which Arioch" "was king (Gen. 14:1, 9). It is supposed that the old Chaldean" "town of Larsa was the metropolis of this kingdom, situated" "nearly half-way between Ur (now Mugheir) and Erech, on the left" bank of the Euphrates. This town is represented by the mounds of "Senkereh, a little to the east of Erech."

See where Ellasar occurs in the Bible...

Definition of Ellasar:
"revolting from God"