Elijah is come already — And yet when the Jews asked John, Art thou Elijah? He said, I am not, John 1:21. His meaning was, I am not Elijah the Tishbite, come again into the world. But he was the person of whom Malachi prophesied under that name.
Related Commentaries of Matthew 17:12
Matthew 17:12
12 But I say unto you, That Elias is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.