Please take this with a grain of salt grigoryev, but this is what I have come up with. They well could once have been part of True Oglala. The shifting of tiospaye seems to be a matter of what winter count one speaks of and the actual locations of said individuals. It seems to me folly to try to track them (which I have done compulsively) but it is an interesting pursuit in the shifting and mixing of the oyate.
(Iwayusóta)(Consumed By Cutting)(Medicine Root)(split off from Ité Šíča) (White Eyes)(1825-1895)(Black Shield)(1835-1890)(Standing Bear)(1841-1890)
(Iwayusota Oglala Lakota) (Used Up by Begging) (Makes Things Hard)
Tobacco (F)(1811-1890+)(Iwayusota)(Canli)(Medicine Root, 1890)(grandmother of Three Stars) Yellow Head (F)(1828-1890+)(Iwayusota)(Nata Zi)(Rosa)(Medicine Root, 1890) Hawk (F)(1844-1890+)(Iwayusota)(Cetan)(Medicine Root, 1890)(mother of Eagle) Yellow (F)(1848-1895+)(Iwayusota)(Zi)(Medicine Root, 1890-1895)(mother of Thomas, Frank Red Fish, Joseph Kills Alone, One Horse) In The Center (F)(1868-1890+)(Iwayusota)(Cokab)(Medicine Root, 1890)(mother of Red Hail)
And, again, for what it's worth. The first "Walks Under Ground" signed the treaty of 1868 and those are the syllables that represent his name which seems to be more than just those three words. "MAH" means "earth," "KAH" might be "that one yonder," "MAH" means "earth" again, "HA" means "buried" and "MAK-NEAR" might stand for "mani" he walks.
Walks Under Ground (M)(1840-1907)(Oyúȟpe) (MAH-KAH-MAH-HA-MAK-NEAR)(1868)
Walks Under Ground (M)(1854-1896+)(Oglala)(Maka Mahel Mani)(Walks Under The Ground) (Porcupine, 1892-1896) (married Ringing circa 1885) Ringing (F)(1855-1896+)(Oglala)(Sna Win)(Rattling Woman)(Hla Hla)(Winyan Sna)
Walks Under The Ground (M)(1842-1896+)(Wablenica)(William Walks Under Ground) (Maka Mahel Mani)(Walks Under Ground)(Maha Mahel Mani) (Wounded Knee, 1890-1896) (married Good Buffalo 1870) (married Badland Nation 1870) (married Looks At Her Horse before 1894) Good Buffalo (F)(1850-1876)(Oglala) Badland Nation (F)(1841-1890+)(Wablenica)(Makosica Oyate) Looks At Her Horse (F)(1848-1895+)(Oglala)(Tasunke Wayanka)(Tasunke Wayankepi)
Black Bear (M)(1835-1906+)(Iyasica)(Mato Sapa)(William Black Bear) (Medicine Root, 1890-1904)(allotted land 1906 at Pine Ridge) (married Elk Woman 1877) (married Wants Her, before 1890) (married Her Four Blankets, before 1890) Elk Woman (F)(1859-1904+)(Torn Blanket)(Sina Hleca)(Onpau Win)(Hehaka Wia) (Hehaka Win)(married William Black Bear, 1877)(married Eagle Horse, 1879) Wants Her (F)(1849-1895+)(Iyasica)(Wants Him)(Cinpe) Her Four Blankets (F)(1853-1890+)(Iyasica)(Tasina Topa)