Thanks Gamegeek for the ideas about Germani. Obviously the word has changed its meaning over time a bit like Kelt/Celt. Am I close to the mark? Would the Cimbri likely have been identiified by a Mediteranean person as Keltoi at one time, then later as Germani? Perhaps even they saw themselves as part iof that group we call Celts?

This possible process of "Germanisation" is fascinating to me. I see aspects of it in the Anglicisation of Britain and I would interested to se if there is an early wave of groups seen as Celtic becoming groups identifying as Germanic.

Nice tree. Is the scrambled bit because they give British a thick trunk and Gaulish a thin trunk, and make it the ancestor of Irish, rather than a common ancestor to all the Celtic tongues? IIRC Gallic was the La tene lingua franca but surely there are regional variations across the massive Celtic world, even in the first onrush of the Iron Age, with modern descendents fronds of those twigs.