Tolkein is a mysterious figure who is often credited in badfic disclaimers. For example:
"Disclamer: This's Tolkein's and PJ's not mine tho I want Leggy!!!11!!!eleventy-one!!11!!"
He is believed to have created "Middleearth," a world full of kingdoms like "Rivendale" (also called "Ilmadris" or "Kraningul"), which is ruled by "Erlond the Elvin King."
He should not, of course, be confused with J.R.R. Tolkien.