Ramman with Nergal and Nana are also enumerated as the special gods of Namar--a Babylonian district which caused the king considerable annoyance, and which may have been one of the strongholds whence the Cassitic kings continued their attacks upon Nebuchadnezzar.
In order to determine more precisely the nature of this deity, it is necessary to turn to Assyria, where his worship dates from the very earliest times, and where he appears consistently in a single role,--that of the god of storms, more particularly of thunder and lightning.

The oldest Assyrian ruler known to us is Samsi-Ramman (_c._ 1850 B.C.), whose name, containing the god as one of its elements, points to the antiquity of the cult of Ramman in the north.

Another king who has frequently been mentioned, Ramman-nirari (_i.e._, Ramman is my helper), bears evidence to the same effect, and Tiglathpileser I.speaks of a temple to Ramman whose foundation carries us back several centuries beyond the period of these two kings--almost to the days of Hammurabi.
The theory has accordingly been advanced that the worship of Ramman came to Babylonia from the north, and since the cult of this same god is found in Damascus and extended as far south as the plain of Jezreel, the further conclusion has been drawn that the god is of Aramaic origin and was brought to Assyria through Aramaic tribes who had settled in parts of Assyria.

The great antiquity of the Ramman cult in Assyria argues against a foreign origin.

It seems more plausible to regard the Ramman cult as indigenous to Assyria; but reverting to a time when the population of the north was still in the nomadic state of civilization, the cult may have been carried to the west by some of the wandering tribes who afterwards established themselves around Damascus.