Quba Khanate
Khinalug language is a Northeast Caucasian language and holds a special place in this family. Some researchers consider this language to be a member of Lezgic languages, while others believe that it forms its own independent branch within the Northeast Caucasian language family. Russian orientalist , who traveled in South Caucasus in 1840s wrote: "It is said that in the Quba Khanate, there are living antiquities. They are the people of Khinalug, who speak a non-human or at least non-local language, that is understood neither by people of Quba, nor by Lezgins". who visited Khinalug in 1926, speculated about the closeness of Khinalug language with Udi language.