Genesis 4:17-18 DBY

17 And Cain knew his wife, and she conceived and bore Enoch. And he built a city; and he called the name of the city after the name of his son Enoch.
18 And to Enoch was born Irad; and Irad begot Mehujael; and Mehujael begot Methushael; and Methushael begot Lemech.