Please help.
I need a surname that suit the [name_m]French[/name_m] Aristocracy vibe. My story revolves around 18s.
Something that sound masculine and dark would do.
Archambault
Baudin
Beaulieu
Boivin
Borde
Bourdillon
Cloutier
Comtois
D’Aramitz
Desjardins
[name_m]Fabron[/name_m]
Gagneux
Labelle
Lapointe
Lecuyer
[name_f]Martel[/name_f]
[name_u]Moreau[/name_u]
Moulin
[name_u]Perrin[/name_u]
Plourde
Poirier
Proulx
[name_m]Thayer[/name_m]
[name_m]Thibault[/name_m]
Voclain
Idk how relevant these are but they were my favorites from the Behind the Name list.
I did a bit of googling for you, but decided I had found enough after reading through the first few letters of the alphabet! 
If you want it to sound really aristocratic, you could add De ____ after the surname: e.g. Andigné De St. [name_u]Maurice[/name_u].
Adhémar
Aigremont
Albignac
Alnoncourt
Andigné
Barbeyrac
Barthélémy
De Boissoudy
Bauffremont
Bellomayre
Bourquenet
Chastanet
Puységur