Genesis Combo
Very often, the full significance of certain events and people early in Genesis is not apparent until we observe the same patterns of sin and redemption as they appear in greater detail later in Biblical history. (Well, that’s my story and I’m sticking to it. You be the judge.)
Here’s some posts that may interest you, on Cain, Tubal-Cain, Adah and Zillah, and Jabal and Jubal.