From www.dictionary.com and a few other places I didn't bother to copy (cause I don't believe in Wikipedia......)
bru⋅net /bruˈnɛt/ Show Spelled Pronunciation [broo-net] Show IPA
–adjective 1. (esp. of a male) brunette.
–noun 2. a person, usually a male, with dark hair and, often, dark eyes and darkish or olive skin.
--------------------------------------------------------------------------------
Origin:
1885–90; < F, equiv. to brun brown + -et -et
bru⋅net /bruˈnɛt/ Show Spelled Pronunciation [broo-net] Show IPA
–adjective 1. (esp. of a male) brunette.
–noun 2. a person, usually a male, with dark hair and, often, dark eyes and darkish or olive skin.
--------------------------------------------------------------------------------
Origin:
1885–90; < F, equiv. to brun brown + -et -et
I know the word exists and what its etymology is. If pushed I might admit to French as a second language even.
Pep (But as I said, I have never ever seen it actually used before, in English. Has anyone?)