Where does “Brittonicism” come from?

Brittonicism (English) comes from English Brittonic, from English Briton, from Old French Breton, from Latin britto, from Latin Brittania, from Ancient Greek Βρεττανία, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂ — Creates collective nouns, which refer to groups...

Brittonicism (English): A Brittonic feature of a language

Definitions

  1. A Brittonic feature of a language

Ancestry of “Brittonicism”, step by step

Brittonicism traces back through two separate lines of ancestry.

via English Brittonic

StepLanguageWordMeaning
1EnglishBrittonicBrythonic; pertaining to the Celtic people...
2EnglishBritonAn inhabitant of Great Britain; A citizen of the...
3Old FrenchBretonBreton
4Latinbrittoa Briton
5LatinBrittaniaBritain
6Ancient GreekΒρεττανίαthe British Isles
7Ancient Greek-ῐ́ᾱ{{l|en|-ia}}; "suffix forming abstract feminine...
8Proto-Indo-European-íh₂
9Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European -h₂Every word from Ancient Greek -ῐ́ᾱEvery word from Ancient Greek Βρεττανία