Where does “Bäckeschdosen” come from?

Bäckeschdosen (Luxembourgish) comes from Luxembourgish Dosen, from French douzaine, from Middle French douzaine, from Old French dozaine, from Old French doze, from Vulgar Latin dodeci, from Latin duodecim, from Latin decem — Creates verbal adjectives from roots.

Bäckeschdosen (Luxembourgish): baker's dozen

Definitions

baker's dozen

Ancestry of “Bäckeschdosen”, step by step

Bäckeschdosen traces back through two separate lines of ancestry.

via Luxembourgish Dosen

Step	Language	Word	Meaning
1	Luxembourgish	Dosen	dozen
2	French	douzaine	twelve; dozen; about twelve
3	Middle French	douzaine	—
4	Old French	dozaine	a group of twelve
5	Old French	doze	twelve
6	Vulgar Latin	dodeci	—
7	Latin	duodecim	twelve; 12; dozen
8	Latin	decem	ten; 10
9	Latin	-nus	-an
10	Proto-Italic	-nos	Creates verbal adjectives from verb stems
11	Proto-Indo-European	-nós	Creates verbal adjectives from roots

via Luxembourgish Bäcker

Step	Language	Word	Meaning
1	Luxembourgish	Bäcker	baker
2	Middle High German	becker	—
3	Old High German	beckeri	—
4	Proto-Germanic	bakārijaz	One who creates baked goods; baker
5	Proto-Germanic	-ārijaz	-er
6	Latin	-ārius	er
7	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Every word from Proto-Indo-European -nós →Every word from Latin -nus →Every word from Latin decem →