Burtas (Russian: Буртасы, Burtasy; Chuvash: Пăртассем, Părtassem; Tatar: Бортаслар, Bortaslar, بُرطاس) were a tribe of uncertain ethnolinguistic affiliation inhabiting the steppe region north of the Caspian Sea in medieval times (modern Penza Oblast, Ulyanovsk Oblast and Saratov Oblast of the Russian Federation). They were subject to the Khazars.[1]