mushrooom's list "French vintage names by a French person" of 1 great name ideas: Valeriane - Valeriane!

French vintage names by a French person

Here is a list of French names that have been actually used by French people, from nobles to commoners. Most of them are go-to if you want a safe French vintage name, though some are more uncommon than others. 
If you want a 'poshy' name, just tie two of them together, like Louis-Emile, or Marie-Amélie. Most common typings are Marie-OtherName and Jean-OtherName. Three names and more are for hardcore bourgeois.
Also look up for the pronunciation or else you'll never get it right.