Where does “Bretagne” come from?

Bretagne (German) comes from French Bretagne, from Old French Bretaigne, from Latin Britannia, from Ancient Greek Βρεττανία, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂, from Proto-Indo-European -h₂ — Creates collective nouns, which refer to groups...

Ancestry of “Bretagne”, step by step

StepLanguageWordMeaning
1FrenchBretagneBritannia the island of Britain in historic times, especially as a Roman province
2Old FrenchBretaignewhat is now known as Britain or the United Kingdom
3LatinBritanniaBritain
4Ancient GreekΒρεττανίαthe British Isles
5Ancient Greek-ῐ́ᾱ{{l|en|-ia}}; "suffix forming abstract feminine...
6Proto-Indo-European-íh₂
7Proto-Indo-European-h₂Creates collective nouns, which refer to groups...
Every word from Proto-Indo-European -h₂Every word from Ancient Greek -ῐ́ᾱEvery word from Ancient Greek Βρεττανία