The Nephilim were on the earth at that time (and also immediately afterward), when those divine beings were having sexual relations with those human women, who gave birth to children for them. These children became the heroes and legendary figures of ancient times.

The blessings of your father have prevailed above the blessings of your ancestors, above the boundaries of the ancient hills. They will be on the head of Joseph, on the crown of the head of him who is separated from his brothers.