Bryachislav suffered a defeat during the battle on the Sudoma River and fled, leaving behind his Novgorodian prisoners and loot.
One version of the name is linked to a folk tale of a family of three giants that lived in the area, the name derived from the mother of the three.
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The area was first mentioned in the chronicles in relation to the events of 1021, when the army of the Kievan prince Yaroslav the Wise defeated the troops of the prince of Polotsk, Bryachislav of Polotsk, at the Sudoma River.