angelic sons of God had relations with women, and the women bore children who grew to possess extraordinary strength. They came to be known by the Hebrew term “Nephilim.” We are told: “The Nephilim proved to be in the earth in those days, and also after that, when the sons of the true God continued to have relations with the daughters of men and they bore sons to them, they were the mighty ones who were of old, the men of fame.” (Genesis 6:4)this supper human offspring were violent. The earth became filled with violence. . . . All flesh had ruined its way on the earth.”—Genesis 6:5, 11, 12. Gen 7:21-24 says that besides Noah and his family, everything died on the surface of the earth. The angles that had relations with women of the earth tho the bible says, dematerialized and went back to heaven where god punished them to Tartarus. A place of inactivity.
The nephilim were a race of men, described in the Book of Genesis as the offspring of the sons of God and the daughters of men. There is no clear Biblical indication of what that means exactly, however. They were ancient giants (some up to ten feet tall, and thought by some to be able to reach up to 30 feet). They had deformities and were apparently quite grotesque. They do not still exist, as they were wiped out in the flood of Noah, although their genes still carried into some generations following Noah. They were eventually completely wiped out by the Israelites.
In the book of genesis they are mentioned as Giants that were on earth. There was a book called Enoch that was found with the Dead Sea scrolls among books of the bible, in Enoch it goes into more detail, naming some of them and describing things they did. In some museums, especially in Europe there are skeletons that were found that were big, like over 7 feet tall that may or may not be proof there were a race of giants.
The Nephillim mentioned in the bible are mythological giants that were suppose to have lived prior to the mythological flood of Noah. They didn't exist then and do not live now. The only evidence found that was said to be from giant humans were some mastodon leg bones that the finder thought were giant human bones in the 1700's. thus far, as with much of the history of the world in the bible, there is not a shred of evidence for it.
"The mighty ones were of old, the men of fame". that were produced by these marriages, were not men of fame with God, for they did not survive the Flood, as did Noah and his family. They were "Nephilim" bullies, tyrants, who no doubt helped to make conditions worse. Their angelic fathers, knowing the construction of the human body and being able to materialize, were not creating life, but lived in these human bodies and, cohabiting with women, brought forth children. Their children, " mighty ones, " were therefore unauthorized hybrids. Apparently the Nephilim did not, in turn, have children. They are not alive today, they died in the flood.