A girl asked her mother, “Mommy, who were the other people?” "What other people?" "You know Adam and Eve were the first people, so who did their children marry?"
Now here is a great question. First the Bible does not tell us who they were or where they came from only that they were there. This is one of those many missing details the bible does not tell us about. There are a lot of theories but no proofs.
A Few Theories:
1. On the eighth day after creation – remember God rested on the seventh day – God got back to work creating and made more people in various parts of the earth.
2. Adam and Eve had more children than we are told and there was necessary incest going on.
3. They just showed up and no one knows from where.
I like number one best ---- Remember how many thousands of years that story was passed down by word of mouth from one generation to the next so some confusion is bound to slip in.