Where does “Леблан” come from?

Леблан (Russian) comes from French Leblanc, from French Blanc, from Middle French blanc, from Old French blanc, from Late Latin blancus, from Frankish blank, from Proto-Germanic *blank, from Proto-Germanic blankaz — to shine, white; to shine, burn, scorch.

Ancestry of “Леблан”, step by step

StepLanguageWordMeaning
1FrenchLeblanc
2FrenchBlancwhite person
3Middle Frenchblancwhite
4Old Frenchblancwhite
5Late Latinblancuswhite
6Frankishblankbright; gleaming, white, blinding; bright,...
7Proto-Germanic*blank
8Proto-Germanicblankazbright, shining, white, gleaming, blinding
9Proto-Indo-Europeanbhleg-to shine, white; to shine, burn, scorch
Every word from Proto-Indo-European bhleg-Every word from Proto-Germanic blankazEvery word from Proto-Germanic *blank