15),[1] only one town called in antiquity by a tribal name--and that a doubtful instance[2]--and no single case of a modern town-name which is derived from the name of a tribe.[3] We have, however, some curious evidence from another source.

There is a late and obscure _Geography of the Roman Empire_ which was probably written at Ravenna somewhere about A.D.

700, and which, as its author's name is lost, is generally quoted as the work of 'Ravennas'.

It consists for the most part of mere lists of names, about which it adds very few details.

But in the case of Britain it notes the municipal rank of the various _coloniae_, and it further appends tribal names to nine or ten town-names, which are thus distinguished from all other British place-names.