An nameless 'Old One' dwells within the moon in The Old One & The Star Spawn.
Some of the beings formerly assumed to be Great Old Ones and Elder Gods are sometimes classed as 'Outer Gods'. The term postdates Lovecraft, although it parallels some of his vague descriptions of the power differences between his creations, but was given backing by the Call of Cthulhu RPG. Great Old Ones are sometimes seen as larval Outer Gods. Often they are similar to the more amoral interpretations of the Elder Gods. They are sometimes associated with the nebulous Other Gods mentioned in connection with Nyarlathotep.