Change of title
The peer review assessment mentioned that the article is clearly not about a legend, but about a personage, Red Horn, who is the protagonist of various stories (legends, myths, etc.). The object is not just to give an account of legends, but to describe the state of knowledge on this deity. The Winnebago describe him as a man, but in a very broad sense, like the Norse mann, which denotes not only mortal humans, but members of various divine races. Given that English is a little more restrictive in this way, I don't advise "man" in the parenthetical part of the title. "Deity" is probably safe enough when broadly construed. He is at least a supernatural being. He is not found in Algonquian sources, nor in Caddoan. One can adduce by argument other cognates all of which are from Siouan tribes. It is probably safe, therefore, to describe him as a "Siouan diety". This is based on what we know, archaeological speculations aside.