Nimetus hoka (inglise Hokan) on tuletatud arvu "kaks" tähistavast sõnast mitmes selle keelerühma keeles, nt *xwak algjuma keeles, c-oocj (hääldus [koːkx]) seri keeles, ha'katšumavi keeles jne.
Jacobsen, William H., Jr.: Hokan Inter-Branch Comparisons. In: Lyle Campbell, Marianne Mithun (ed.): The Languages of Native America. Historical and Comparative Assessment. University of Texas Press, Austin TX u. a. 1979, ISBN 0-292-74624-5, lk 545–591.
Gordon, Lynn: Maricopa Morphology and Syntax. (= University of California Publications in Linguistics. 108). University of California Press, Berkeley CA u. a. 1986, ISBN 0-520-09965-6.
Langdon, Margaret: Some Thoughts on Hokan With Particular Reference to Pomoan and Yuman. In: Lyle Campbell, Marianne Mithun (ed.): The Languages of Native America. Historical and Comparative Assessment. University of Texas Press, Austin TX u. a. 1979, ISBN 0-292-74624-5, lk 592–649.
McLendon, Sally: Sketch of Pomo, a Pomoan Language. In: William C. Sturtevant (ed.): Handbook of North American Indians. Vol. 17: Ives Goddard (ed.): Languages. Smithsonian Institution, Washington DC 1996, ISBN 0-16-048774-9, lk 507–550.