Correct form of Iron Age British names

[M. Demetrius]

even a etymology looks solid, it still may be not

And homonyms from one language to another may have no connection whatsoever. There are only so many sounds, and just because two sound, or look, similar, doesn't mean they have the same sources. English is full of words that would be very confusing to decipher should the language fall into disuse.

Lead, the verb, and lead, the metal look alike, for example, but really have no connection, nor are they pronounced the same way. Sorry to point out the obvious, but it's just my gift to society.