THE EIGHT GENERATION:
Lamech took two wives: (Genesis 4:19)
1) Adah
a) Adah bore Jabal (father of those whom dwell in tents, and of such that have cattle). (Genesis 4:20)
b) Jabal's brother was Jubal, the father of all such as handle the harp and the organ. (Genesis 4:21)
2) Zillah
a) Zillah bore Tubal-cain, an instructor of every artificer in brass and iron. (Genesis 4:22)
b) Naamah is the sister of Tubal-cain (Genesis 4:22)

From Enoch was born Methuselah. (Genesis 5:21)
Enoch was 65 years old when Methuselah was born. (Genesis 5:21)
Enoch had sons and daughters. (Genesis 5:22)
Methuselah died at 969 years old.
The age of the world was 697 years when Methuselah was born.
(Genesis 1:24-31, 5:3, 6, 9, 12, 15, 18, 21)