That is the list of the families from Noah’s sons. They are arranged according to their nations. From those families came all the people who spread across the earth after the flood.
All the people who lived in the area around the Mediterranean Sea came from these sons of Japheth. Each son had his own land. All the families grew and became different nations. Each nation had its own language.
God began by making one man (Adam). From him God made all the different people. God made them to live everywhere in the world. God decided exactly when and where they must live.