The Nephilim (“fallen ones, giants”) were the offspring of sexual relationships between the sons of God and daughters of men in Genesis 6:1–4. There is much debate as to the identity of the “sons of God.” It is our opinion that the “sons of God” were fallen angels (demons) who mated with human females or possessed human males who then mated with human females. These unions resulted in offspring, the Nephilim, who were “heroes of old, men of renown” (Genesis 6:4).
Why would the demons do such a thing? The Bible does not specifically give us the answer. Demons are evil, twisted beings—so nothing they do should surprise us. As to a distinct motivation, one speculation is that the demons were attempting to pollute the human bloodline in order to prevent the coming of the Messiah. God had promised that the Messiah would one day crush the head of the serpent, Satan (Genesis 3:15). The demons in Genesis 6 were possibly attempting to prevent the crushing of the serpent and make it impossible for a sinless “seed of the woman” to be born. Again, this is not a specifically biblical answer, but it is biblically plausible.
What were the Nephilim? According to Hebraic and other legends (the Book of Enoch and other non-biblical writings), they were a race of giants and super-heroes who did acts of great evil. Their great size and power likely came from the mixture of demonic “DNA” with human genetics. According to the movie Noah, starring Russell Crowe (reviewed by us here), the Nephilim were fallen angels encased in rock. All that the Bible directly says about them is that they were “heroes of old, men of renown” (Genesis 6:4). The Nephilim were not aliens, angels, “Watchers,” or rock monsters; they were literal, physical beings produced from the union of the sons of God and the daughters of men (Genesis 6:1–4).
What happened to the Nephilim? The Nephilim were one of the primary reasons for the great flood in Noah’s time. Immediately after the mention of Nephilim, God’s Word says, “The LORD saw how great man’s wickedness on the earth had become, and that every inclination of the thoughts of his heart was only evil all the time. The LORD was grieved that he had made man on the earth, and his heart was filled with pain. So the LORD said, ‘I will wipe mankind, whom I have created, from the face of the earth—men and animals, and creatures that move along the ground, and birds of the air—for I am grieved that I have made them’” (Genesis 6:5–7). God proceeded to flood the entire earth, killing everyone and everything other than Noah, his family, and the animals on the ark. All else perished, including the Nephilim (Genesis 6:11–22).
Were there Nephilim after the flood? Genesis 6:4 tells us, “The Nephilim were on the earth in those days—and also afterward.” It seems that the demons repeated their sin sometime after the flood as well. However, it likely took place to a much lesser extent than it did prior to the flood. When the Israelites spied out the land of Canaan, they reported back to Moses: “We saw the Nephilim there (the descendants of Anak come from the Nephilim). We seemed like grasshoppers in our own eyes, and we looked the same to them” (Numbers 13:33). This passage does not say the Nephilim were genuinely there, only that the spies thought they saw the Nephilim. It is more likely that the spies witnessed very large people in Canaan and in their fear believed them to be the Nephilim. Or it is possible that after the flood the demons again mated with human females, producing more Nephilim. It is even possible that some traits of the Nephilim were passed on through the heredity of one of Noah’s daughters-in-law. Whatever the case, these “giants” were destroyed by the Israelites during their invasion of Canaan (Joshua 11:21–22) and later in their history (Deuteronomy 3:11; 1 Samuel 17).
What prevents the demons from producing more Nephilim today? It seems that God put an end to demons mating with humans by placing all the demons who committed such an act in isolation. Jude verse 6 tells us, “The angels who did not keep their positions of authority but abandoned their own home—these he has kept in darkness, bound with everlasting chains for judgment on the great Day.” Obviously, not all demons are in “prison” today, so there must have been a group of demons who committed further grievous sin beyond the original fall. Presumably, the demons who mated with human females are the ones who are “bound with everlasting chains.” This would prevent any more demons from attempting such sin.


  • Eric E says:

    Wow, there’s so much baseless speculation and unbiblical superstition in this one short essay it’s embarrassing to see it on a Catholic website. Angels (fallen or not) are spiritual beings and have no bodies or “DNA”. See Hebrews 1:14 and Luke 24:37-39.
    One can’t claim that nephilim were a primary cause of the flood just because they’re mentioned before the reasons of the flood were given (which do not include the nephilim in them!). It’s more fitting to associate the nephilim with the passage right before their mention, which addresses incredible human life-spans, beauty, and the growth of the human race on the earth.
    The Bible clearly tells us what the nephilim were: “heroes that were of old, warriors of renown” (Gen 6:4). Just because the culture of the ancient Jews ascribed their strength and heroism to a divine nature, doesn’t mean we have to make up myths to force the trope into a supernatural explanation.

  • bryan joseph real says:

    Amen amen.
    bread of life

  • Romel says:

    Sorry but I don’t agree with you on this one.
    And I don’t believe that this is in accordance with the Catholic Church teachings.
    There’s no other part in the Bible that says or points that Angels of God mates with human females.
    And it would be quite absurd (sorry for the word) if that happens.
    But I think you might consider this:
    The Sons of God pertains to humans that are in the line of Adam and Seth. Adam was created in the image and likeness of God, and Seth was created in the image and likeness of Adam. There are also verses that points out that the Sons of God are the people who obey God’s commandments. And the sons of man are the people who obey the world.
    Son of God also pertains to Jesus, because of His perfect image and likeness to God. This strenghtens the argument that the Sons of God are the people who obeys God.
    Additionally, inter-racial marriages has been an issue in Salvation History. Interracial here pertains to marrying unbelievers or marrying a person that has not the same faith. (most typical example is Solomon who marries princesses and concubines that are pagans that swayed his heart from God)

  • JMB says:

    Eric you might want to check out Steve Quayle’s site, as well as LA Marzulli’s web page – there is plenty of credible info if you care to investigate, and as far as angels taking on human form, you might want to read the book of Tobit and many other stories of angels appearing as humans! Don’t be deceived by what you think to be abhorrent. The Bible speaks clearly as to the fact that the fallen ones came into the women of Adam’s line – since the devil clearly has always been about trying to corrupt all of God’s creation from the very beginning until the End of TImes, which we are in!!! God’s Blessings to open the Eyes of Many!

    • Peter Boer says:

      LA Marzulli has zero relationship with the Catholic Church, and Catholic theology. Remember how many heresies have the non denominational and neo-protestant churches created…….

  • janus says:

    I do not know if they are myths but if you have read the verses in the bible mentioned in this article the where described as giants, not just literal heroes. If they where heroes why would God wanted them slayed by Joshua?

  • susan.s says:

    As jesus said that the angels do not get married so its only logic that they were created with no sexual organs.. so can they change thier physical and create new organs to reproduct ..can angels creat new form of bodies….and why they were only males… do angels even have sexual orientation…

  • JOHN says:

    they are the sons of adam and his first wife lilith

  • cosmos chuks says:

    How can u know some one who is nepilim,and did nepilim still existing in this our generation today.

  • C A MATHEW says:


  • Joseph oçan says:

    How do we term the act of homosexuality and lesbianism, in the world’s today?? Is it nephilim?

  • Michelle says:

    I agree with Romel’s comment. When my stepdaughter who is Protestant approached me with this subject and I read the verses, I also read it as People in line with God who mated with People who did not worship God.

    • Rurik says:

      If they were the “sons of God” BECAUSE they were in line with God, they would be excluding themselves from that title by the very act in discussion…in other words, can you say “Those who followed God, didn’t follow God…”? Seems like flawed logic to me…Even If that’s the case, why were their offspring giants?

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