From Russian Юкагиры (Jukagiry), from Yakut Юкагир (Yukagir) (plural Yakut Юкагирдер (Yukagirder). The "Yuka" in Yukaghir may derive from a Yukaghir word for "distant", but may also be related to "yuka" seen in Evenki-language clan-names such as Yukaminka and Yukamisi, both living on the Amur river, traditionally. The suffix -ghir is likely of Evenki origin; compare Orochon clans such as Bayaghir, Iglaghir, Kindighir, Nikaghir, Tuluyaghir, and the Evenk tribe called Samaghir, on the Amur River. The Yukaghir call themselves Odul (“strong, powerful”).
Yukaghir pl (plural only)
Jochelson, Waldemar: 1926, The Yukaghir and the Yukaghirized Tungus. Memoirs of the AMNH; vol.13. New York: G.E. Stechert 1910-1926.