Dniepr Balts
The Dniepr Balts, a hypothetical subgroup of the Eastern Balts, are Baltic tribes that lived near the Dnieper River in the Bronze Age, and later were assimilated by the Slavs. The Dniepr Balts were studied by the archaeologist Marija Gimbutas, Lithuanian linguist Kazimieras Būga, and by Russian scientists Vladimir Toporov, O.Trubachev, who analysed hydronyms at the higher Dnieper basin. They have found nearly 800 hydronyms of possibly Baltic origin.