Rev 12:4 And his tail drew the third part of the stars of heaven, and did cast them to the earth...

1/3 followed satan and were cast or born in the flesh on earth... they are the Kenites.

Jesus said:

"John 8:44 Ye are of [your] father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it."

Rev 12:9And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.

"his angels" are the fallen angels... NOT 1/3 that followed satan. The 1/3 of angels that followed satan are the Kenites.