When Methuselah was 187, he had Lamech.
Enoch had a son named Irad. Irad was the father of Mehujael, Mehujael was the father of Methushael, and Methushael was the father of Lamech.
Enoch had such a close relationship with God that he didn't die, he just wasn't there anymore, because God took him.
After Lamech was born, Methuselah lived another 782 years and had other sons and daughters.
