Agreed, this question is the must voted of the whole site.
But it fit perfectly the "General Reference" pattern. Typing "Tom Bombadil" in Google lead to Wikipedia and the second link is LOTR Wikia
How this question could remain open and the Sifo-Dyas question closed?
Also see : Why was the Sifo-Dyas question closed as general reference?
The Tom Bombadil question is now [Closed]