Proper noun
Proto-Baltic
The reconstructed ancestor of the Baltic languages, descended from Proto-Balto-Slavic.
The traditional view is that the Balto-Slavic languages split into two branches, Baltic and Slavic, with each branch developing as a single common language (Proto-Baltic and Proto-Slavic) for some time afterwards. Source: Internet
This would imply that Proto-Baltic, the last common ancestor of all Baltic languages, would be identical to Proto-Balto-Slavic itself, rather than distinct from it. Source: Internet
Place names featuring *ner- or *nar- are wide-ranging over the vast Proto-Baltic homeland, occupying western Russia before the Slavs. Source: Internet