Between the Pitch people and the TAno'm, in the Horse Ranch country, lived the Ko'il, the Wailaki (proper). Most of the survivors of these spoke Yuki also.
DATA FROM LUCY YOUNG
The following notes, mainly on Athabascans, were obtained at Round Valley on July 13, 1938. Lucy Young, the informant, was born on Eel River at Tseyes̆enteƚ, opposite Alder Point. Though listed by the Government as a Wailaki, she is actually what ethnologists call Lassik. Her father was born 3 mi. from Alder Pt.; her mother, at Soldier Basin, 22 mi. NE. Her mother's first cousin was T'a·su's, known to the whites as Lassik, from his Wintun name Lasek. He was chief for Alder Pt., Soldier Basin, (upper) Mad River. Mary Major, informant's contemporary, is from Soldier Basin and of the same tribe.
The following were obtained as names of groups of people, though some of them may be place names.
Setelbai, "yellow rock," Alder Pt., etc.
Nals̆a, "eat each other," downstream, around Fort Seward.
Kos̆o-yaη, "soaproot eaters," farther downstream and on Van Duzen R.
Tenaη-keya, Mad R. Indians.
Kentetƚa(η), Kettenchow V., a flat with roots.
Sec̆(ƚ)enden-keya, at Zenia.
Ka·snol-keya, S of Zenia, called Kikawake in Hayfork [Wintun].
Tok'(a)-keya, South Fork of Eel Indians [Sinkyone].
Sayaη, "lamprey eel eaters," the Spy Rock
Wailaki [the Ko'il of Tillotson].
Djeh-yaη, "pinenut eaters," the Pitch Wailaki, on North Fork Eel R.
[The outlook seems to have been chiefly downstream and inland.]
Non-Athabascans
C̆iyinc̆e, Yuki.
Baikihaη, Hayfork Wintu.
Yaη-keya, the Wintu from Weaverville to Redding; their own name was Poibos. The same name Yaη-keya was applied also to the Cottonwood Creek Wintun, whom the Lassik met at Yolla Bolly Mt. to trade salt. [Wintu and Wintun were treated as one language.]
Yitá·kena, people of lowest Eel R., the Wiyot.