The Hebrew Bible names Adam's famous sons. But the Chronicles of Jerahmeel, a 12th-century Hebrew chronicle translated by SAFE0 Gaster in 1899, names the ones you have never heard of. Adam fathered three sons and three daughters—Cain with his twin wife Qalmana, Abel with his twin wife Deborah, and Seth with his twin wife Noba. After Seth, Adam lived 700 more years and fathered eleven additional sons and eight daughters, all named in the text.
Each patriarch's extended family fills out a genealogy far richer than the biblical version. Seth fathered sons named Elideah, Funa, and Matath. Enosh had sons named Ehor and Aal. Mahalalel fathered seven sons and five daughters. Enoch had five sons and three daughters before God "desired him and took him away"—placing him in the Garden of Eden to wait there until Elijah appears to restore the hearts of fathers to children.
Cain's parallel line runs darker. He married Temed at fifteen, fathered Enoch, and built seven cities. His descendants invented civilization's tools—Jabal pioneered shepherding, Jubal discovered music and preserved it on twin pillars of marble and brick to survive the flood, Tubal-Cain forged iron weapons, and Naamah invented textile arts. But these inventions came alongside corruption. The people used music to corrupt the earth. They made graven images for worship.
The chapter ends with God's promise after the flood. Noah offered sacrifices, and God vowed never again to curse the earth with water. But the promise carried a warning: if humanity sinned again, judgment would come by famine, sword, fire, pestilence, or earthquake. And at the end of days, God declared, "I shall revive the dead and awaken those who slumber in the dust. The grave shall close its mouth. There shall be a new earth and new heavens for an everlasting habitation."