The story
- Proto-Indo-European*bʰerH-?
- Proto-Germanic*brūnaz
- Frankish*brūn
- Old Frenchbrun
- Old Frenchbrunet
- Old Frenchbrunete
- Frenchbrunette
- English todaybrunette
Borrowed from French brunette, the feminine form of brunet, from brun (“brown”). Doublet of burnet.
Etymology from Wiktionary, CC BY-SA 4.0.