Nah. Sounds too "Western mythos", which
Skyward Sword isn't. If anything, it is more probable that Nintendo might have drawn inspiration from Amatsu-Mikaboshi, a figure mentioned in the
Nihon Shoki as the "god of evil" or "god of the stars." However, said god does not assume a physical form like that of other gods of Japanese myth, such as Amaterasu and Tsukiyomi, but instead takes on a non-corporeal form, much like Demise is described to have done.
Furthermore, it is regarded to have existed since before the dawn of the universe itself. It is essentially evil incarnate—taking on a form that differs depending on how the given individual himself perceives evil—again, much like Demise is described to have done. The attribute of having given birth to all evil seems to eerily draw similarities to Amatsu-Mikaboshi as well, above all else...
What makes things a tad dubious is that, despite its title as "god of evil," Amatsu-Mikaboshi isn't
necessarily evil,
per se. In other words, he's not "Shinto Satan". If anything, however, he is the quintessential opposing force of all things "positive." This negative force is believed to have manifested in at least the majority of all of
The Legend of Zelda's villains, and serves as the driving force behind Ganondorf's actions. (Which is what Nintendo was trying to tell us to begin with, but dumb. 9_9)
To the OP:
If you want to know more, just ask. I have nothing better to do... :u