Question: What was the first name of the person who recorded the size of the Brigantia territory in the 2nd century AD?
Sentence (from "Brigantia (ancient region)"): The territory of Brigantia which now forms Northern England and part of The Midlands covered the majority of the land between the River Tyne and the River Humber forming the largest Brythonic Kingdom in ancient Britain.
Relevant evidence: Yes