More help needed

Hi. I am also looking to see if anyone has any info on something I read lately on the Net. The article I read claimed that there was a greater affinity between Germanic and Celtic civilisation than is sometimes assumed, and was largely based on the similarity of a Celtic form "tud", meaning something like "people" or "nation", and the word "teutonic". Basing any argument on one word is a bit tenuous, I know, but it sounded interesting, at least. Anyone know any useful links?
Ta, folks,
Jamie