There are many tribes that had matriarchal systems especially the Sioux. Women always had a say in the decisions made by the top members of the tribe. Sadly that isn't what it is like today. The Europeans turned a lot of our tribes into patriarchal systems, when we were matriarchal. I am Oglala Lakota Tetonwan. We are more known as Sioux which means snake or enemy which comes from the Chippewa word Nadowe-is-iw (singular) which the French transformed it into Sioux. Which is why alot of Natives don't like that name. The Tetonwan come from the original Seven Council Fires which were the Mdewakantonwan (Camping at Spirit Lake), Wahpekute (Leaf Shooters), Wahpetonwan (Camping among Leaves), Sisitonwan(Camping among Swamps), Ihanktonwan (Camping at the End), Ihanktonwanna (Camping at the little End), and Tetonwan (Camping on the Plains). The Seven Council Fires of the Tetonwan are the Oglalas (Scatter One's Own), Miniconjou (Planters by the River), Sicangu (Burnt Thighs), Oohenonpa (Two Kettles), Itazipco (Without Bow), Sihasapa (Black Feet), Hunkpapa (End of Horn). There are three dialects spoken in the Original Seven Council Fires, which were Dakota, Nakota, and Lakota. All of the Tetonwan are Lakota. The Mdewakantonwan, Wahpekute, Wahpetonwan, and Sisitonwan are Dakota. The Ihanktonwan and the Ihanktonwanna are Nakota. Now you know some more stuff about the "Sioux." :] I do find this picture highly disrespectful, it is downgrading those who have truly earned the right to wear the sacred headdress.