毘伽可汗
Yury Zuev reconstructed 悅般 "Yueban"'s underlying form as *"Örpen" ~ "Ürpen", identifiable with the toponym "Örpün" mentioned in Bilge Khagan inscription. Zuev also compared *"Örpen" ~ "Ürpen" to the prefecture 咽麫 "Yànmiàn" (supposedly from MC &lt; *"iet-mien" &lt; *"ermen" ~ "örmen"?) at the Irtysh headwaters in the 7th century. Meanwhile, Vladimir Tishin compared 咽麫 "Yànmiàn" (&lt; LMC *"ʔjianˊ-mjianˋ" &lt; EMC *"ʔɛnH-mjianH" &lt; *"Emän") to the names of the Chumukun's "town of Yan" (咽城) and the Emel River.