The last entry? Yeah, I take it all back.
Apparently, the word ‘papa’ has been found to be present in approximately 700 of the 1000 currently used languages, and is therefore thought to be an artifact of the mother (or father, I suppose) of all languages. Perhaps this would be an interesting name for it? It would certainly be better than proto-proto-proto-proto-proto-proto Indo European, wouldn’t you say?