Where does “leiteiro” come from?

leiteiro (Portuguese) comes from Latin lactārius, from Spanish leche, from Old Spanish leche, from Vulgar Latin lactem, from Latin lác, from Proto-Indo-European ǵlákts — milk.

leiteiro (Portuguese): milkman

Definitions

milkman

Ancestry of “leiteiro”, step by step

Step	Language	Word	Meaning
1	Latin	lactārius	pertaining or relating to milk
2	Spanish	leche	milk; cum, semen; shit
3	Old Spanish	leche	—
4	Vulgar Latin	lactem	first-person singular present active subjunctive...
5	Latin	lác	milk
6	Proto-Indo-European	ǵlákts	milk

Every word from Proto-Indo-European ǵlákts →Every word from Latin lác →Every word from Vulgar Latin lactem →