Ka-Nu was created by Robert E. Howard in "The Skull of Silence", "Delcardes' Cat", and other Kull stories.[2]
In his first appearance, in the adaptation of "The Skull of Silence" in Creatures on the Loose #10, Ka-Nu's appearance matches closer Brule's. Although both Ka-Nu and Brule appear in the original story,[2] Brule's name is not mentioned in the adaptation, while in The Kull Comics Chronology in Conan Saga #97, Brule is listed, but not Ka-Nu.[3] Given the original story, and given the sources don't contradict each other, it can be considered both were present.