On etymology of Yurok (the.k.the. Weitspekan).

This in the image below is from either Campbell (1997):

"Yurok is from Karuk yúruk meaning literally 'downriver'. The Yurok traditional name for themselves is Puliklah (Hinton 1994:157), from pulik 'downstream' + -la 'people of', thus equivalent in meaning to the Karuk name by which they came to be known in English (Victor Golla, personal communication)." (Campbell 1997:401, notes #131 & 132)

"The connection of Wiyot and Yurok in northern California (which together were formerly called Ritwan, after Dixon and Kroeber's [1913] grouping of the two as one of their more remote Californian stocks) with Algonquian was first proposed by Sapir (1913) and was quite controversial at that time (see Michelson 1914, 1915; Sapir 1915a, 1915b; see also Chapter 2), but the relationship has subsequently been demonstrated to the satisfaction of all (see Haas 1958; Teeter 1964a; Goddard 1975, 1979, 1990). Before 1850 the Yurok lived on the lower Klamath River. The Wiyot (earlier called Wishosk) lived in the Humboldt Bay area, in the redwood belt; the last fully fluent speaker died in 1962 (Teeter 1964b). Many scholars have commented that although Wiyot and Yurok are neighbors in northern California, they seem not to have a closer relationship with each other than either has with Algonquian...." (Campbell 1997:152).

Bibliography

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