"...And in the time of greatest despair there shall come a savior, and he shall be known as: THE SON OF THE SUNS."- Journal of the Whills, 3: 127

From the second script draft of Star Wars: Episode IV - A New Hope, then called Adventures of the Starkiller, Episode I: The Star Wars

https://naboonews.wordpress.com/2018/06/13/george-lucas-wanted-the-third-star-wars-trilogy-to-get-into-the-world-of-the-whills/