Cain made love to his wife, and she became pregnant and gave birth to Enoch. Cain was then building a city, and he named it after his son Enoch.
References for Genesis 4:17
To Enoch was born Irad, and Irad was the father of Mehujael, and Mehujael was the father of Methushael, and Methushael was the father of Lamech.
Lamech married two women, one named Adah and the other Zillah.
References for Genesis 4:19
Adah gave birth to Jabal; he was the father of those who live in tents and raise livestock.