BBC: Genesis 4:17-22
Cain knew his wife, and she conceived and bore Enoch. When he built a city, he called the name of the city after the name of his son, Enoch. To Enoch was born Irad, and Irad fathered Mehujael, and Mehujael fathered Methushael, and Methushael fathered Lamech. And Lamech took two wives. The name of the one was Adah, and the name of the other Zillah. Adah bore Jabal; he was the father of those who dwell in tents and have livestock. His brother's name was Jubal; he was the father of all those who play the lyre and pipe. Zillah also bore Tubal-cain; he was the forger of all instruments of bronze and iron. The sister of Tubal-cain was Naamah. - Genesis 4:17-22
This passage is helpful in determining the nature of the genre of Genesis. Up until this chapter, there are many portions of Genesis that utilize symbolic, apocalyptic and poetic language. But at this point in the book, the depth of historical elements takes root. The passage of names here is not mythology but history.
Lamech is one of the most interesting early characters in the Old Testament. Here his offspring is mentioned as those who developed important human characteristics. The successful method of a nomad life is developed by Lamech's children. His other children took up early music and artistry. His children were also those who developed the physical instruments themselves.
The giving of these names are important. The climax of Cain's line is the advancement of the human condition. The climax of Seth's line will be worship (Gen 4:26).
*The Bible Blogging Commentary is a slow and simple treading of the Scriptures. No quotes from other theologians and no explicit Greek/Hebrew lessons.*