The First mention of CROM

King CONAN of Aquilonia is discussing the people of the north with his adviser Prospero, he says of them,

Their gods are CROM and his dark race, who rule over a sunless place of everlasting mist, which is the world of the dead.

I'm curious to see how CROM evolves through the stories, since apart from his use as an expletive, he's not getting mentioned very much so far.
But hey, now I play a waiting game!

From "The Phoenix on the Sword"
Page 29 "The complete Chronicles of CONAN"