It was once believed that Yamnaya was ancestral to Corded Ware, however, did we later discover that Yamnaya and Corded Ware are rather sister groups, and that Yamnaya is only ancestral to Anatolian, Armenian, Balkanian/Illyrian and Hellenic speakers, with Corded Ware being ancestral to Afanasievo/Tocharians, to the common ancestors of Balto-Slavic speakers and the Andronovo horizon that led to Indo Iranian speakers, and also to the common ancestors of Germanic and Italo-Caltic speakers ? Is the genealogy tree like that ?

I find very conflicting informations about the time a few key events regarding the Italo-Celtic branch took place.

What is the consensus on when did...

- Italo-Celtic split from rest of Bell Beaker

- Italic split from Celtic

- Osco Ubrian split from Latino Faliscan

- Umbrians arrive in Italy

- Latins arrive in Italy...

?

Is this even the correct order ? Could Osco Umbrian and Latino Faliscan be no more related to eachother, actually, than they are to Celtic branch ?

I heard Osco Umbrian is rather in the Celtic branch and its speakers separated from the ancestors of specifically insular Celts right before they crossed the sea, and migrated South. I am quite unsure about that but I think the two Italic branches may have been related only insofar they were both Italo-Celtic and have converged over time due to geographical proximity.