What does Genesis 5:19 mean?
Jared fathered more sons and daughters during his 800 years after fathering Enoch. Judging by what we'll see of Enoch's life in the next few verses, it's very possible that Jared (or his father or grandfather) passed on to those sons and daughters what it meant to live in relationship to God. The fact that Enoch was so close to God might be due to godly parenting on the part of Jared.On the other hand, Jared's grandson and great-grandson, Methuselah and Lamech, will both be alive in the years shortly before the flood. At that point in time, the state of mankind is best described as "evil" (Genesis 6:5). Looking at the lifespans given in this chapter, it stands to reason that many, if not most, of Enoch's peers were probably not followers of God. It's possible, if not likely, that at least a few of Enoch's brothers and sisters, and certainly many of his nieces and nephews, were killed when God sent destruction to remove that evil.