Moses
Genesis 6:4BSB·traditional attribution

The Nephilim were on the earth in those days—and afterward as well—when the sons of God had relations with the daughters of men. And they bore them children who became the mighty men of old, men of renown.

John Calvin Reformed @genevareformer

4. There were giants in the earth . Among the innumerable kinds of corruptions with which the earth was filled, Moses especially records one in this place; namely that giants practiced great violence and tyranny. I do not, however, suppose, that he speaks of all the men of this age; but of certain individuals, who, being stronger than the rest, and relying on their own...

Matthew Henry Presbyterian @wholebiblehenry

We have here a further account of the corruption of the old world. When the sons of God had matched with the daughters of men, though it was very displeasing to God, yet he did not immediately cut them off, but waited to see what would be the issue of these marriages, and which side the children would take after; and it proved (as usually...

Commenting on Genesis 6:4-5

John Gill Reformed Baptist @doctorgill

There were giants in the earth in those days,.... That is, in the days before the sons of God took the daughters of men for wives, in such a general manner as before declared, or before the declension and apostasy became so universal; even in the times of Jared, as the Arabic writers (n) understand it, who say that these giants were begotten on the...