Chushan-rishathaim means blackness of iniquities

Chushan-rishathaim: Cush of double wickedness, or governor of two presidencies, the king of Mesopotamia who oppressed Israel in the generation immediately following Joshua (Judges 3:8). We learn from the Tell-el-Amarna tablets that Palestine had been invaded by the forces of Aram-naharaim (Mesopotamia) more than once, long before the Exodus, and that at the time they were written the king of Aram-naharaim was still intriguing in Canaan. It is mentioned among the countries which took part in the attack upon Egypt in the reign of Rameses III. (of the Twentieth Dynasty), but as its king is not one of the princes stated to have been conquered by the Pharaoh, it would seem that he did not actually enter Egypt. As the reign of Rameses III, corresponds with the Israelitish occupation of Canaan, it is probable that the Egyptian monuments refer to the oppression of the Israelites by Chushan-rishathaim. Canaan was still regarded as a province of Egypt, so that, in attacking it Chushan-rishathaim would have been considered to be attacking Egypt. Nothing further is known of this man.

Aram-naharaim: Aram of the two rivers, is Mesopotamia (as it is rendered in Genesis 24:10), the country enclosed between the Tigris on the east and the Euphrates on the west (Psalm 60); called also the "field of Aram" (Hosea 12:12, R.V.), the open country of Aram; in the Authorized Version, "country of Syria." Padan-aram was a portion of this country.

Padan-aram: the plain of Aram, or the plain of the highlands, (Genesis 25:20; 28:2,5-7; 31:18, etc.), commonly regarded as the district of Mesopotamia lying around Haran.
The word means high, or highlands, and as the name of a country denotes that elevated region extending from the northeast of Palestine to the Euphrates. It corresponded generally with the Syria and Mesopotamia of the Greeks and Romans. In Genesis 25:20; 31:20,24; Deuteronomy 26:5, the word "Syrian" is properly "Aramean." Damascus became at length the capital of the several smaller kingdoms comprehended under the designation "Aram" or "Syria."
Haran, "parched;" or probably from the Accadian charana, meaning "a road." A celebrated city of Western Asia, now Harran, where Abram remained, after he left Ur of the Chaldees, till his father Terah died (Genesis 11:31,32), when he continued his journey into the land of Canaan. It is called "Charran" in the LXX. and in Acts 7:2. It is called the "city of Nahor" (Genesis 24:10), and Jacob resided here with Laban (Genesis 30:43). It stood on the river Belik, an affluent of the Euphrates, about 70 miles above where it joins that river in Upper Mesopotamia or Padan-aram, and about 600 miles northwest of Ur in a direct line. It was on the caravan route between the east and west. It is afterwards mentioned among the towns taken by the king of Assyria (2 Kings 19:12; Isaiah 37:12). It was known to the Greeks and Romans under the name Carrhae.
MESOPOTAMIA, the fertile crescent

Civilization developed slowly in different parts of the world. People began to settle in areas with abundant natural resources. A section of the Middle East is called the Fertile Crescent. The Fertile Crescent is a rich food-growing area in a part of the world where most of the land is too dry for farming. The Fertile Crescent is a quarter-moon shaped region that extends from the eastern shore of the Mediterranean Sea to the Persian Gulf.
Some of the best farmland of the Fertile Crescent is on a narrow strip of land between the Tigris and Euphrates Rivers. The Greeks later called this area Mesopotamia, which means “between the rivers.” Many different civilizations developed in this small region. First came the Sumerians, who were replaced in turn by the Assyrians and the Babylonians. Today this land is known as Iraq.

Mesopotamia: the country between the two rivers (Heb. Aram-naharaim; i.e., "Syria of the two rivers"), the name given by the Greeks and Romans to the region between the Euphrates and the Tigris (Genesis 24:10; Deuteronomy 23:4; Judges 3:8,10). In the Old Testament it is mentioned also under the name "Padan-aram;" i.e., the plain of Aram, or Syria (Genesis 25:20). The northern portion of this fertile plateau was the original home of the ancestors of the Hebrews (Genesis 11; Acts 7:2). From this region Isaac obtained his wife Rebecca (Genesis 24:10,15), and here also Jacob sojourned (Genesis 28:2-7) and obtained his wives, and here most of his sons were born (Genesis 35:26; 46:15). The petty, independent tribes of this region, each under its own prince, were warlike, and used chariots in battle. They maintained their independence till after the time of David, when they fell under the dominion of Assyria, and were absorbed into the empire (2 Kings 19:13).
God's blessings to each of you,

LJG

SOURCES: King James Bible, Easton's Bible Dictionary, Dowling, Mike, "Mr. Dowling's Mesopotamia page," available from http://www.mrdowling.com/603mesopotamia.html; Internet; updated Thursday, August 3, 2006