Genesis 10:1

1. In the search of these genealogies we must avoid both carelessness, for the reasons now mentioned, and excessive curiosity about every particular person here named, and the people sprung from him; which is neither necessary nor profitable, nor indeed possible now to find out, by reason of the great changes of names, through length of time, loss of ancient records, differences of languages, extinction of families, conquest and destruction of nations, and other causes. It may suffice that divers of them, and those the most eminent, are evident and discernible at this day, as will appear in the progress, by which we may and ought to presume the truth of the rest, whose names are lost in the public confusions of the world in former ages, of whom I shall therefore be silent, and only speak of the principal persons, and that briefly.

2. The same people which were originally seated in one place did ofttimes shift their places, or at least sent forth colonies; and that sometimes into places far distant from their brethren, as appears from the ancient and famous expeditions mentioned in sacred and profane story. So you must not wonder if you meet with the same people in divers countries.

3. In general, the world was divided into three parts, whereof the more eastern parts were allotted to Shem and his issue, the more southern parts to Ham, and the more northern parts of it to Japheth.