In Lakota mythology, Iktomi is a spider-trickster spirit, and a culture hero for the Lakota people. Alternate names for Iktomi include Ikto, Ictinike, Inktomi, Unktome, and Unktomi. These names are due to the differences in tribal languages, as this spider deity was known throughout many of North America's tribes.
According to the Lakota, Iktomi is the son of Inyan, the Rock, a creator god similar in form to other male creator gods. Iktomi has a younger brother, Iya, who is a destructive and powerful spirit. One story of Iktomi goes that in the ancient days, Iktomi was Ksa, or wisdom, but he was stripped of this title and became Iktomi because of his troublemaking ways. The Oglala Indians of south Dakota presents Iktomi as the second manifestation, or degeneration, of Ksa, which hatched from the Cosmic Egg being laid by Wak-Inyan, the primordial thunderstorm. Ksa invented language and stories, names and games. In this version Iya is the son of Unk (defined as passion), who detested Ksa. Iya and Unk had an incestious relationship out of which Gnaski, the demon, was the result. Because of this, and for not taking the advice of Ksa, Unk was expelled from the circle of divine entities. Unk wanted to outwit Ksa with the help of the cunning of Gnaski. Gnaski succeeds in this, mainly because he has no fear of Skan (the Judge, Activity), by sowing confusion. Gnaski enabled this by mimicking Ksa to perfection; therefore, Gnaski is called Ksapela (little wisdom). The first people were not able to distinguish between the two. Through his folly Gnaski entangles Ksa completely, and through the activity of Skan Ksa consequently becomes a spider, the meaning of the name Iktomi. Iktomi still had the feature of making games. It seems that Iktomi, in stories attributed to him, in his very essence is representing the confusion between wisdom and folly. He began playing malicious tricks because people would jeer at his strange or funny looks. Most of his schemes end with him falling into ruin when his intricate plans backfire. These tales are usually told as a way to teach lessons to Lakota youth. Because it is Iktomi, a respected (or perhaps feared) deity playing the part of the idiot or fool, and the story is told as entertainment, the listener is allowed to reflect on misdeeds without feeling like they are being confronted. In other tales, Iktomi is depicted with dignity and seriousness, such as in the popularized myth of the dreamcatcher.