According to Robert's version of Geoffrey's story, Britain was originally called Brutain, after Brut or Brutus, the son of Aeneas.

Locrin was the eldest son of Brutus and his wife Innogen, and defeated Humber, king of Hungary, in a great battle; after which Humber was drowned in the river which still bears his name.

Locrin's daughter Averne (or Sabre in Geoffrey) was drowned likewise, in the river which was consequently called Severn.

The British king Bathulf (or, in Geoffrey, Bladud) was the builder of Bath; and the son of Bladud was Leir, who had three daughters, named Gornorille, Began, and Cordeille.

Kymbel (in Geoffrey, Kymbelinus), who had been brought up by Augustus C{ae}sar, was king of Britain at the time of the birth of Christ; his sons were Guider and Arvirag (Guiderius and Arviragus).
Another king of Britain was King Cole, who gave name (says Geoffrey falsely) to Colchester.