The biggest Yotvingian kurhan in the area of Suwałki
Yotvingians or Sudovians (also called Suduvians, Jatvians, or Jatvingians in English) (Lithuanian: Jotvingiai, Sūduviai; Latvian: Jatvingi; Polish: Jaćwingowie, Belarusian: Яцьвягі) were a Baltic people with close cultural ties to the Lithuanians and Prussians. The Yotvingian language (sometimes called Sudovian) was a Western Baltic language nearest to Prussian, but with small variations.