In the "Cthulhu Mythos" of fantasy writer H.P. Lovecraft (1890-1937)the Universe is ruled by beings known as the Elder Gods, Outer Gods, or Other Gods.
The most famous creation of Lovecraft is the Great Old One, Cthulhu himself. Cthulhu, with the rest of his race (the "Spawn of Cthulhu"), is at present imbedded in a vast tomb at the bottom of the Pacific Ocean. He seems to be the most important Great Old One on Earth.
Lovecraft has described Cthulhu thusly:
"...simultaneous pictures of an octopus, a dragon and a human caricature... A pulpy, tentacled head surmounted a grotesque and scaly body with rudimentary wings... A monster of vaguely anthropoid outline, but with an octopus-like head whose face was a mass of feelers, a scaly, rubbery-looking body, prodigious claws on hind and fore-feet, and long, narrow wings behind. This thing... was of a somewhat bloated corpulence... It lumbered slobberingly into sight and groping squeezed its gelatinous green immensity through the black doorway. ...A mountain walked or stumbled."
--The Call of Cthulhu by H.P. Lovecraft