The three names Jabal, Jubal, and Tubal are formed from root signifying to "flow, run, go forth," perhaps "blow," from which comes יובל yôbēl the "blast" or trumpet-note of joy and release. Accordingly, all sorts of going forth, that were suitable to the life of a nomad, seem to have distinguished this family. The addition of Cain to the name of Tubal may have been a memorial of his ancestor, or an indication of his pursuit. Tubal of the spear or lance may have been his familiar designation. The making of tents implies some skill in carpentry, and also in spinning and weaving. The working in brass and iron furnishes implements for war, hunting, or husbandry. The construction of musical instruments shows considerable refinement in carving and moulding wood. Naamah, the lovely, seems to be mentioned on account of her personal charms.

Tubal-cain - The first smith on record, who taught how to make warlike instruments and domestic utensils out of brass and iron.
Agricultural instruments must have been in use long before, for Cain was a tiller of the ground, and so was Adam, and they could not have cultivated the ground without spades, hooks, etc. Some of these arts were useless to man while innocent and upright, but after his fall they became necessary. Thus is the saying verified: God made man upright, but they have sought out many inventions. As the power to get wealth is from God, so also is the invention of useful arts.
M. De Lavaur, in his Conference de la Fable avec l'Histoire Sainte, supposes that the Greeks and Romans took their smith-god Vulcan from Tubal-cain, the son of Lamech. The probability of this will appear,
1. From the name, which, by the omission of the Tu and turning the b into v, a change frequently made among the Hebrews, Greeks, and Romans, makes Vulcain or Vulcan.
2. From his occupation he was an artificer, a master smith in brass and iron.
3. He thinks this farther probable from the names and sounds in this verse. The melting metals in the fire, and hammering them, bears a near resemblance to the hissing sound of צלה tsillah, the mother of Tubal-cain; and צלל tsalal signifies to tinkle or make a sound like a bell, 1-Samuel 3:11 2-Kings 21:12.
4. Vulcan is said to have been lame; M. De Lavaur thinks that this notion was taken from the noun צלא tsela, which signifies a halting or lameness.
5. Vulcan had to wife Venus, the goddess of beauty; Naamah, the sister of Tubal-cain, he thinks, may have given rise to this part of the fable, as her name in Hebrew signifies beautiful or gracious.
6. Vulcan is reported to have been jealous of his wife, and to have forged nets in which he took Mars and her, and exposed them to the view of the whole celestial court: this idea he thinks was derived from the literal import of the name Tubal-cain; תבל tebel signifies an incestuous mixture of relatives, Leviticus 20:12; and קנא kana, to burn with jealousy; from these and concomitant circumstances the case of the detected adultery of Mars and Venus might be easily deduced. He is of opinion that a tradition of this kind might have readily found its way from the Egyptians to the Greeks, as the former had frequent intercourse with the Hebrews.
Of Naamah nothing more is spoken in the Scriptures; but the Targum of Jonathan ben Uzziel makes her the inventress of funeral songs and lamentations. R. S. Jarchi says she was the wife of Noah, and quotes Bereshith Rabba in support of the opinion. Some of the Jewish doctors say her name is recorded in Scripture because she was an upright and chaste woman; but others affirm that the whole world wandered after her, and that of her evil spirits were born into the world. This latter opinion gives some countenance to that of M. De Lavaur.

And Zillah, she also bare Tubalcain,.... Thought by many to be the same with Vulcan, his name and business agreeing; for the names are near in sound, Tubalcain may easily pass into Vulcan; and who, with the Heathens, was the god of the smiths, and the maker of Jupiter's thunderbolts, as this was an artificer in iron and brass, as follows: his name is compounded of two words, the latter of which was no doubt put into his name in memory of Cain his great ancestor; the former Josephus (u) reads Thobel, and says of him, that he exceeded all in strength, and had great skill in military affairs:
an instructor of every artificer in brass and iron; he taught men the way of melting metals, and of making armour and weapons of war, and other instruments, for various uses, out of them; and he seems to be the same with the Chrysor of Sanchoniatho; for he says (w) of them (Agreus and Halieus) were begotten two brothers, the inventors of iron, and of working of it: one of these, called Chrysor, is said to be Hephaestus or Vulcan; and Chrysor, as Bochartus (x) seems rightly to conjecture, is "Choresh-Ur, a worker in fire"; that, by means of fire, melted metals, and cast them into different forms, and for different uses; and one of these words is used in the text of Tubalcain; and so, according to Diodorus Siculus (y), Vulcan signifies fire, and was not only the inventor of fire, but he says he was the inventor of all works in iron, brass, gold, and silver, and of all other things wrought by fire, and of all other uses of fire, both by artificers and all other men, and therefore he was called by all "fire". Clemens of Alexandria (z) ascribes the invention of brass and iron to the Idaeans or priests of Cybele in Cyprus; and so Sophocles in Strabo (a):
and the sister of Tubalcain was Naamah; whose name signifies "pleasant", fair and beautiful; and is thought by some to be the Venus of the Heathens; the Arabic writers (b) say she was a most beautiful woman, and found out colours and painting; and by others Minerva; and Josephus (c) says she excelled in the knowledge of divine things; and Minerva is by the Greeks called Nemanoum (d). The Jews say (e) she was the wife of Noah; and some of them say (f) she was the wife of one Shimron, and the mother of the evil spirit Asmodeus, mentioned in Tobit, and of whom other demons were begotten: the Targuru of Jonathan adds,"she was the mistress of lamentation and songs;''but our Bishop Cumberland (g) conjectures, that she was the wife of Ham, was with him in the ark, and after the flood was the means of leading him into idolatry: what led him to this conjecture was, that he observed in Plutarch, that the wife of Cronus, the same with Ham, is by some called Nemaus, which brought Naamah to his mind. Josephus (h) makes the number of children Lamech had by his two wives to be seventy seven.
(u) Antiqu. l. 1. c. 2. sect. 2. (w) Ut supra. (Apud Euseb. Praepar. Evangel. l. 1. p. 35.) (x) Canaan, l. 2. c. 2. col. 706. (y) Bibliothec. l. 1. p. 11, 13. & l. 5. p. 341. (z) Stromat. l. 1. p. 307. Vid. Plin. Nat. Hist. l. 34. c. 1, 2. (a) Geograph. l. 10. p. 326. (b) Elmacinus, p. 8. apud Hottinger. Smegma Oriental. l. 1. C. 8. p. 232. (c) Antiqu. l. 1. c. 2. sect. 2. (d) Plutarch. de Jide. (e) Bereshit Rabba, sect. 23. fol. 20. 3. Jarchi in loc. Shalshalet Hakabala, fol. 1. 2. (f) R. Elias Levita in Tishbi, fol. 19, 21. (g) History of Sanchoniatho, p. 107. (h) Antiqu. l. 1. c. 2. sect. 2.

From Tubal - Cain, probably the Heathen Vulcan came. Why Naamah is particularly named, we know not: probably they did, who lived when Moses wrote.