The article deals with the oikonyms on the present-day territory of Belarus, which were
renamed as a result the denomination in the XXth century. Such placenames are based on the statesmen’s surnames. The oikonyms, which were lost because of denomination, are defi ned, their toponymic stems are analyzed. It is revealed, that the lost oikonyms register the historical anthoponymicon, and they were in some cases the unique recording of ancient proper names, the lost oikonyms were derived from the geographical terms, which were typical in certain region.