A right tributary of Sozh River, the Pronia begins near the village of Lanenka, Dubrowna District, Vitebsk Oblast.

This correlates with the names of the Peranka, Perenka, Perinka, Piryanka rivers, which lie in the Sozh basin near the Pronya.

[3] Earlier, together with the modern name the river was also called the Propoy, also referring to its fast flow.

When the girl's father reached the glade, he saw the confluence of two rivers, which turned into the Basya and Pronya.

[6] The sources of the Pronya are located in the Smolensk Upland, near the village of Lanenka [be], Dubrovna District, Vitebsk Region.