Who were the Nephilim?

      The Nephilim were the children of the "sons of God" and the daughters of men (Genesis 6:4). The KJV renders these creatures as giants, which is what they actually were. They were inhabitants of the land of Canaan and reported by the Israelites as of great size (Numbers 13:31-33). The Hebrew term for the "sons of God" is B'nai Elohim, which actually means "Angels of God," and the Hebrew term for Nephilim is naphal, which means "to fall." According to Genesis 6:4 and Numbers 13:33, the Nephilim were on the earth both before the flood and after. If the flood killed every living thing and all mankind (Genesis 7:21-23), except for Noah and his family, then these creatures couldn't have been the offspring of men. Thus, it may reasonably be inferred that the Nephilim were the unnatural offspring of the fallen angels and the daughters of men (Jude 6-7).

        The Nephilim were on the earth in those days --and also afterward-- when the sons of God went to the daughters of men and had children by them. They were the heroes of old, men of renown. (Genesis 6:4)
        And 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. In a similar way, Sodom and Gomorrah and the surrounding towns gave themselves up to sexual immorality and perversion. They serve as an example of those who suffer the punishment of eternal fire. (Jude 6-7)