Brython

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Bryth·on

B0519300 (brĭth′ən, -ŏn′)n.1. An ancient Celtic Briton. No longer in scholarly use.2. A member of a Brittonic-speaking people. No longer in scholarly use.
[Welsh, from Latin Brittonēs, Britons; see Briton.]

Brython

(ˈbrɪθən) n (Peoples) a Celt who speaks a Brythonic language. Compare Goidel[C19: from Welsh; see Briton]