Nennius adds that Celidon Wood was called "Cat Coit Celidon" by the Britons.
Caledonia is an old name for Scotland, and this wood covered an ill-defined area from north of the border up to the mouths of the Clyde and Tweed. J
The Battle in the Celidon Wood could have taken place at almost anywhere within this area. Town of Drumelzier on the River Tweed appears to be a number of peoples candidate.
The Battles of King Arthur