Kthanid is an Elder God created by Brian Lumley, portrayed as a brother of Cthulhu. He looks almost the same as Cthulhu, but his eyes glow gold and his wings are more majestic and splendid.
Regarded as benevolent and described as an extremely knowledgeable strategist, in some works he is the leader of the Elder Gods. In Lumley's Titus Crow series he aids the heroes against the Great Old Ones.