Maped all settlements in Belarus mentioned in Wikipedia (Official Standard edition — be.wikipedia). Those that have an info about the date of foundation or first mention (only 6.5% in total, somewhat 1.5k out of 23k) also plotted on the timeline below.

Interestingly, the relative number of the settlements with the indicated date is much higher in the Homyel region (37%) — this is where the tireless editors of the Belarusian version come from, I guess. You can play with the interactive version and explore all the collected lines by regions, centures, and settlement types: https://yanouski.com/work/graphing-belarus/settlements-origins/