What would you think of my opinion that the Drowned God’s resemblance to Cthulhu is only superficial. The ironborn give off the “stupid-crazy” vibe, not the “eldritch-crazy” vibe. Their version of divinity seems more along the lines of Odin mixed with a really dark interpretation of Christ. I mean, its kind of hard to be driven mad by knowledge when education, literacy, and intelligence are considered unholy. (Patchface could’ve easily seen Elenei’s dad, all sea gods need not be the same)

Well, this is more @boiledleather‘s specialty than mine, but…

• there’s the legend of the Seastone Chair predating humanity and it’s made out of the same oily black stone found at the base of the Hightower, the Isle of Toads, the city of Yeen, the city of Asshai, the Five Forts, etc. That oily black stone is linked by Maester Theron to the Deep Ones.
• Speaking of Maester Theron, he argued in his Strange Stone that “These Deep Ones, as he names them, are the seed from which our legends of merlings have grown, he argues, whilst their terrible fathers are the truth behind the Drowned God of the ironborn.”

• The Ironborn believe that “we did not come to these holy islands from godless lands across the sea…we came from beneath those seas, from the watery halls of the Drowned God, who made us in his likeness,” which makes “the ironmen…closer kin to fish and merlings than the other races of mankind.”
• the Grey King, first of the Ironborn King, “took a mermaid to wife, so his sons and daughters might live above the waves or beneath them as they chose.”

Seems a bit more than superficial to me. Or maybe you’re trying to fool the surface world into thinking the Deep Ones don’t exist…