The Fallen Angels who rebelled against their gods breed with human females to produce a line of Demi of semi divine creatures, Theses were the Nephilim.
They were identifiable by their 6 fingered hands.
The Jewish King David fought giants.
The Nephilim were the offspring of the “sons of God” and the “daughters of men” before the Deluge, according to Genesis 6:4 of the Bible. According to Numbers 13:33, they later inhabited Canaan at the time of the Israelite conquest of Canaan.
The Nephelim are often referred to as to as the Fallen Angles, or Those who have Fallen.
The Nephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of men, and they bore children to them. Those were the mighty men who were of old, men of renown. (Genesis 6:4, NASB)