köken: Etymology tree Proto-Mongolic *hüne- Proto-Mongolic *-gan Proto-Mongolic *hünegender. Persian فنک Borrowed from a Southern Mongolic dialect of Middle Mongol ancestral to Mongghul funige (“fox”), from Proto-Mongolic *hünegen (“fox”).
köken: Cognate with late Middle Mongol 乞兒殺 (kirsa), Kalmyk кирс (kirs). No doubt related through borrowing or inheritance with Proto-Common Turkic *karsak (“corsac fox”), compare Kazakh қарсақ (qarsaq), but the differences between the two forms are hard to explain. Another potential cognate is Proto-Tungusic *karsa (“marten”), see Manchu ᡥᠠᡵᠰᠠ (harsa).