Brythonic (adj.)youdaoicibaDictYouDict[Brythonic 词源字典]
"of the Britons, Welsh," 1884, from Welsh Brython, cognate with Latin Britto (see Briton). Introduced by Welsh Celtic scholar Professor John Rhys (1840-1915) to avoid the confusion of using Briton/British with reference to ancient peoples, religions, and languages.[Brythonic etymology, Brythonic origin, 英语词源]