Where does “bredouilleur” come from?

bredouilleur (French) comes from French bredouiller, from Old French bredeler, from French bretonner, from French Breton, from Old French Breton, from Latin britto, from Latin Brittania, from Ancient Greek Βρεττανία — Creates collective nouns, which refer to groups...

bredouilleur (French): stammerer; mumbler

Definitions

stammerer; mumbler

Ancestry of “bredouilleur”, step by step

Step	Language	Word	Meaning
1	French	bredouiller	to stammer, to mumble
2	Old French	bredeler	—
3	French	bretonner	to talk or speak Breton; to talk or speak...
4	French	Breton	the Breton language
5	Old French	Breton	Breton
6	Latin	britto	a Briton
7	Latin	Brittania	Britain
8	Ancient Greek	Βρεττανία	the British Isles
9	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
10	Proto-Indo-European	-íh₂	—
11	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Every word from Proto-Indo-European -h₂ →Every word from Ancient Greek -ῐ́ᾱ →Every word from Ancient Greek Βρεττανία →