one of a people inhabiting Britain before the Anglo-Saxon invasions beginning in the 6th century AD. The majority were probably Cymric Celts, who arrived on the island at an unknown date but perhaps beginning as early as the 7th or 6th century BC; they undoubtedly mixed with aborigines who spoke non-Indo-European languages.
BRITON
Meaning of BRITON in English
Britannica English vocabulary. Английский словарь Британика. 2012