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Fausset's Bible Dictionary [1]

The city at the northern bound of Israel, as Beersheba was the southern, so that" from Dan even to Beersheba" ( Judges 20:1, etc., and bitterly,  1 Chronicles 21:2, "from Beersheba even to Dan") expresses the whole country. Originally Leshem or Laish, see above. "Far from Zidon, in the valley that lieth by Beth Rebob," but belonging to Zidon, as their living "after the manner of the Zidonians" implies; they were too far off for Zidon to help them when attacked by the Danites ( Judges 18:7;  Judges 18:28). Already in Abraham's time, the spot was called by him Dan, the scene of God's "judgment" on Chedorlaomer and the invaders ( Genesis 14:14; compare  Isaiah 41:1-3).

But its ordinary name was even then Lasha or Laish, the north-eastern bound of Canaan, as Sodom was the southwestern bound ( Genesis 10:19). This too would be an additional reason for the Danites naming their city close by Abraham's camping ground, Daniel The repetition thrice of "the city" ( Judges 18:28-29) marks that there was already another application of the name "Dan," namely, to Abraham's camping ground (compare  Deuteronomy 34:1). Le Clerc suggests that the fountain was called Dan, "judge," as Ainmishpat means "the fount of justice." The city was smitten by Benhadad ( 1 Kings 15:20, the last place of mentioning it).

Now Tel-El-Kady (the Arabic equivalent to Dan), "the judge's mound," whose long level top is strewed with ruins, probably those of Daniel From its foot gushes out one of the largest fountains in the world, the main source of the Jordan, called el Led-dan, a corruption of Dan, and the stream from it Nahr ed Dahn; all these names confirming Le Clerc's view. The land is truly "a large land, where there is no want of anything that is on the earth" ( Judges 18:10). In  1 Kings 7:13-14, Hiram the worker in brass is said to be of Naphtali; but in  2 Chronicles 2:13-14, he is called "son of a woman of Dan." As the "outgoings" of Naphtali were at Jordan, the city Dan probably was in the tribe of Naphtali.

So she dwelt in Naphtali, but was by birth of the Danite colony there. An undesigned mark of truth. The seeming discrepancy, thus cleared, powerfully disproves the possibility of collusion, and shows the witness of Kings and of Chronicles to be mutually independent and true. A place in S. Arabia from whence the Phoenicians obtained wrought iron, cassia, and calamus ( Ezekiel 27:19). "Dan also." Since none of the other places begin with "also" (Hebrew W¦- ), Fairbairn translates it as Vedan, the modern Aden, near the straits of Babelmandeb. Ptolemy mentions a Dara. But probably, as Judah is mentioned in  Ezekiel 27:17, so Dan in  Ezekiel 27:19 represents northern Israel. Sailors from ports of Dan, with descendants of Javan, traded in the fairs of Tyre, "going to and fro."

International Standard Bible Encyclopedia [2]

A city familiar as marking the northern limit of the land of Israel in the common phrase "from Dan even to Beer-sheba" ( Judges 20:1;  1 Samuel 3:20 , etc.). Its ancient name was Laish or Leshem ( Judges 18:7 , etc.). It was probably an outlying settlement of Tyre of Sidon. Its inhabitants, pursuing the ends of peaceful traders, were defenseless against the onset of the Danite raiders. Having captured the city the Danites gave it the name of their own tribal ancestor (Jdg 18). It lay in the valley near Beth-rehob ( Judges 18:28 ). Josephus places it near Mt. Lebanon and the fountain of the lesser Jordan, a day's journey from Sidon ( Ant. , V, iii, 1; VIII, viii, 4; BJ , IV, i, 1). Eusebius, Onomasticon says it lay 4 Roman miles from Paneas on the way to Tyre, at the source of the Jordan. This points decisively to Tell el - Ḳāḍy , in the plain West of Banias. The mound of this name - Ḳāḍy is the exact Arabic equivalent of the Hebrew Dan ̌ - rises from among the bushes and reeds to a height varying from 40 to 80 ft. The largest of all the springs of the Jordan rises on the west side. The waters join with those of a smaller spring on the other side to form Nahr el - Leddān which flows southward to meet the streams from Bāniās and Ḥasbeiyeh . The mound, which is the crater of an extinct volcano, has certain ancient remains on the south side, while the tomb of Sheikh Marzuk is sheltered by two holy trees. The sanctuary and ritual established by the Danites persisted as long as the house of God was in Shiloh, and the priesthood in this idolatrous shrine remained in the family of Jonathan till the conquest of Tiglath-pileser ( Judges 18:30;  2 Kings 15:29 ). Here Jeroboam I set up the golden calf. The ancient sanctity of the place would tend to promote the success of his scheme ( 1 Kings 12:28 f, etc.). The calf, according to a Jewish tradition, was taken away by Tiglath-pileser. Dan fell before Benhadad, king of Syria (  1 Kings 15:20;  2 Chronicles 16:4 ). It was regained by Jeroboam Ii ( 2 Kings 14:25 ). It shared the country's fate at th hands of Tiglath-pileser ( 2 Kings 15:29 ).

It was to this district that Abraham pursued the army of Chedorlaomer ( Genesis 14:14 ). For Dr. G. A. Smith's suggestion that Dan may have been at Bāniās see HGHL 1, 473, 480 f.