EntityQ1248800· pop 24· linked from 1,045 articlesCommon BrittonicSign in to saveancient Celtic language of Britain, ancestor to Welsh, Cornish, Breton and CumbricConnectionsLINGUIST ListEntityBretonEntityCornishEntityGaulishEntityCumbricEntityPictishEntityEnglish languageConceptLatinEntityIndo-EuropeanEntityIrishEntityGreat BritainEntityInternational Standard Book NumberEntityWelshEntityTacitusEntityPtolemyEntityScottish GaelicEntityRiver ThamesEntityYorkEntitylanguage familyEntityCeltic languagesEntityCategoriesBrittonic languagesBrythonic CeltsExtinct Celtic languagesHistorical forms of languages with ISO codesHistory of the Welsh languageLanguage articles with Linglist codeLanguage articles with Linguasphere codeLanguages without Glottolog codeLanguages without ISO 639-3 code but with Linguasphere codeLanguages without ISO 639-3 code but with Linguist List codeProto-languages