Mordvin Tatars
Mordvin Tatars (Russian: Мордовские татары, Italian: Tartari di Mordua) was a term used to refer to medieval nobility of Volga Tatar, Volga Finnic, and Burtas descent serving Grand Duchy of Moscow. 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.