The term was used interchangeably with the term Mordvin princes (Russian: Мордовские князья) in 15-16th centuries in official documents of Grand Duchy of Moscow. First the term was applied to pagan princes.[4]
More princley families list Ivan Smirnov and Vladimir Velʹi͡aminov-Zernov: Yenikeyev (founder Yenikey-murza Kuldyashev of Moksha descent), Shugurov (Moksha), Smilenev (Moksha),[9] Prosandeyev[10] p.94, Alekseyev (Volga Finnic), Andreyev (Volga Finnic), Bayushev, Engalychev, Ichalov (Erzya), Izdebersky (Volga Finnic), Karamzin, Kazurov (Volga Finnic), Kildishev (Volga Finnic), Kizhedeyev (Volga Finnic), Kuprin, Lapin (Volga Finnic), Maksheyev (Moksha),Meshchersky (Moksha), Mokshazarov (Volga Finnic), Mordvinov (Moksha), Mushkubeyev (Volga Finnic), Pavlov (Volga Finnic), Razgildeyev (disputable Volga Tatar or Volga Finnic descent), Romodanov (Volga Finnic), Tyapin (Volga Finnic),[11] Kirdyakov,[12] Sheysupov (Tatar).[13][14]
"It is important to note that they [Muscovy authorities] as a rule recorded in possessory documents names and ancestral nicknames of only known persons. The names of their more ancient ancestors who had lived there before their lands were annexed do not interest the Muscovy authorities"[15]
Burtases are mentioned as Burtases and Posop Tatars interchangeably.[16]
Vladimir Velyaminov-Zernov. Studies on Kasimovskij kings and princes (published in "Proceedings of the Eastern Division of the Imperial Archaeological Society, Part IX, X, XI, 1863 - 1866, h. XII, 1887
Akchurin, Maksum; Isheev, Mullanur (2017), "Temnikov: The Town of a Tümen Commander. The History of Towns of The "Mordovian Peripheries" In The 15th–16th centuries", Golden Horde Review, 5 (3), Kazan: 629–658, doi:10.22378/2313-6197.2017-5-3.629-658
Belyakov, Andrey (2013-03-12), «Невидимки» русской армии XVI века["Invisibles" in the Russian Army of the 16th century], History of Military Affairs (in Russian) (Special issue: The Russian Army in the era of Ivan the Terrible: Materials of Academic Discussion on the 455th Anniversary of the beginning of the Livonian War. Part I. Is.2), Saint-Petersburg: 159–178
Belyakov, Andrey (2013), Isiney Karamyshev Musaitov's son. Unknown hero of the Time of Troubles. Review No 6. Part 3, Nizhniy Novgorod: NNGU Publishing