Board Thread:Questions and Answers/@comment-11836-20170208210806/@comment-16461120-20171124191437

Undoniel wrote: In (with the original author that I know, but I might be wrong on some): I corrected the spelling of R'lyeh and noted that it's a Lovecraft creation as well as added notation that Hastur is incorporated into Cthulhu mythos as well.
 * Erich Zann (Lovecraft)
 * Hounds of the Tindalos (Frank Belknap Long, incorporated in Cthulhu mythos)
 * Leng (Lovecraft)
 * Nyarlothoteph (Lovecraft)
 * Cthulhu (Lovecraft)
 * Book of R'lyeh/R'lyeh Texts (Lovecraft)
 * Shib Nigurath (in invocation, but it's presumably Shub-Niggurath) (Lovecraft)
 * Hastur (Ambrose Bierce, incorporated in Cthulhu mythos)