Yes Strongs defines them as a as an old tribe of giants like the Watussi in Africa today. .
Sons of God represent those who are led by the spirit of God . Not the spirit of rebellion by the fallen angels . Daughters of men in respect to the seed of men represent unbelievers. When they mingled with believers they produce really tall men .
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In that passage sons of God cannot be interpreted as any man or woman at that time. Man can only be a son of God by being born again through the death, burial and resurrection of Jesus Christ. Therefore, it is not possible for these to be born again.