of 600 BC, after which the common language began to separate into dialects. This date does not necessarily correspond to any historical or archaeological evidence; developing a synthetic view of the ethnology of proto-historic Italy is an incomplete and ongoing task.

Linguist Julius Pokorny carries the etymology somewhat further back. Conjecturing that the -a- was altered from an -o- during some prehistoric residence in Illyria, he derives the names from an o-grade