[4] The most plausible theory, according to the 1994 Great Russian Encyclopedia, says that the ancestors of the Nağaybäks traditionally lived in central districts of the Khanate, east of Kazan, and most likely descended from Nogay and Kipchak people.

[4] Reliable historical evidence of Nağaybäk people start with a 1729 record detailing 25 villages of "newly baptized [Tatars]" (Russian: новокрещёны) in Ufa uezd, east of the Kama River.

[4] During the Tatar and Bashkir revolts of late 17th and early 18th century the Nağaybäks remained loyal to the Russian Empire.

[4] Another defensive fort was built in 1736 in the village of Nagaybak, 64 versts from Menzelinsk (present-day Bakalinsky District).

The new fortress became the hub of the "newly baptized", and by 1744 the nearby Nağaybäk population increased to 1359 people in eleven villages.

[7] Loyal cossacks and troops, headed by captain Rushinsky, fled to Menzelinsk; most of the remaining soldiers joined the rebellion and participated in the siege of Ufa.

[4] These Nağaybäks settled on traditionally Muslim territories, and by the beginning of the 20th century they converted back to Islam and were reassimilated into Tatar ethnos.