Yotvingians (also called: Sudovians, Jatvians, or Jatvingians; Yotvingian: Jotvingai; Lithuanian: Jotvingiai, Sūduviai; Latvian: Jātvingi; Polish: Jaćwingowie, Belarusian: Яцвягі, German: Sudauer) were a Western Baltic people who were closely tied to the Old Prussians.[1][2] The linguist Petras Būtėnas asserts that they were closest to the Lithuanians.[3] The Yotvingians contributed to the formation of the Lithuanian state.[4]