Getae and Dacians? Are they the same? Or is this unknowable?

[Robert Vermaat]

There is no way that the Cimbri,Teutonii, and Bastarnae, were related to Dacians or Massagetae. They were Germanic with a Capital "G." That's what "Teuton" means.

Well, actually... We've discussed this before on the list I think.. Bastarnae were Germanic alright, but see.. the names of Cimbri and Teutones.. actually sound a lot like Celtic names.
Cimri sounds a lot like Celtic names for 'the people'. Combrogi or *Kombroges, meaning compatriots, as in the modern name Cymru (Cumria) for Wales, Cumbria the English variant. Or Tuatha meaning 'people'.
Teutones could originate from Proto-Germanic *Þeudan?z, but also from Túath (plural túatha), Old Irish for people, tribe or nation. It's in fact a word found also in Latvian (tauta) and even South Italian Oscan (touto) with a comparable meaning.
The names of the kings of these groups also sound suspiciously Celtic: Boiorix (King of the Boii), Gaesorix (King of the Gaesatae), and Lugius (after the Celtic god Lugh).
Neither MUST mean that the tribes weren't Germanic, but it sounds a bit too much like a later misidentification to rule out that both tribes were not at least a mix of Germanic- and Celtic-speaking groups. A bit like Attila bearing a Gothic name as king of the Huns.

Of course, neither group had any Dacian connection, let's be clear about that.