1) An englishman 2) Any Beatle 3) Bath mate 4) Celt 5) Celtic people 6) Cockney 7) Cymric Celt 8) Early Celt 9) Englander 10) Kelt 11) Lion and unicorn wearer 12) London native 13) Londoner or liverpudlian 14) Mate, usually 15) Native of Leeds or Dover 16) Native of london 17) Native of Newcastle 18) Native of old Blighty Found on https://www.crosswordclues.com/clue/briton
one of a people inhabiting Britain before the Anglo-Saxon invasions beginning in the 6th century . The majority were probably Cymric Celts, who ... [2 related articles] Found on http://www.britannica.com/eb/a-z/b/115
Brit'on adjective [ Anglo-Saxon bryten Britain.] British. [ Obsolete] Spenser. -- noun A native of Great Britain. Found on http://www.encyclo.co.uk/webster/B/100
a native or inhabitant of Great Britain, esp. of England. · one of the Celtic people formerly occupying the southern part of the island of Britain. Found on https://www.infoplease.com/dictionary/briton