Before reporting: I'm a mod
With Texas and other states forcing religion in public schools, this now is political.
And after Cain, Abel, and Seth, Adam had multiple other children who are never named. We don't know who, how many, or genders.
Genesis 5:4-5
"4 And the days of Adam after he had begotten Seth were eight hundred years: and he begat sons and daughters:
5 And all the days that Adam lived were nine hundred and thirty years: and he died."
That's it. But I'd imagine you could get a lot of sons and daughters in 800 years...