J. R. R. Tolkien

J. R. R. Tolkien was the author of The Lord of the Rings. While working at a garden centre, Fitz Kreiner had a conversation with a woman who incorrectly named him as R. J. Tolkien. Fitz convinced her that the character of Frodo had been named after a woman with whom Tolkien had a relationship. (PROSE: The Taint)

Tolkien briefly met the Eleventh Doctor and Amy Pond during a C. S. Lewis reading at an Inklings gathering at The Eagle and Child of a story that would become The Lion, the Witch and the Wardrobe He didn't like Lewis' work much, saying that it contained a meaningless mixture of too many mythologies. (COMIC: The Professor, the Queen and the Bookshop)

Behind the scenes
No DWU source informs us that his initials stand for, aside from the fact that Professor reveals that his first name is John.