Astre

Bijou is a name that lives up to its definition -- a real jewel. Warning: not unheard of on poodles' dog collars. Actress Bijou Phillips is its best known bearer. It can also be spelled Bijoux.

Bijou

This simple yet evocative French word name was chosen for her daughter by model Niki Taylor.  While Ciel may be pronounced in French with two syllables, many will pronounce it as "seal" and there may be confusion with Celia and sister Ceil.

Ciel

Colline

Caillou

Espirit

Etincelle

Feuille

Fevrier

Fleuve

Hiver

Used in France as a male name, this would make an appealing and unusual choice, as would two other Gallic month names, Avril and Mai. 

Janvier

Juillet

Lilas

Lune

Libellule

Mardi

Matin

Nuage

Papillon

One of the most familiar — if not stereotypical — Gallic names. Pierre was a Top 5 name in France from the 19th century through 1940 and is now on a steady decline in its native land. In the US, Pierre was most common in the 1980s but it has never cracked the Top 300.
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Australian supermodel Miranda Kerr welcomed a son named Pierre in 2024, which may boost its profile.

Pierre

Paix

Pieuvre

Pluie

Reverie is a strong-sounding word for an ethereal, dreamlike state -- a perfect contrast and meaning for a word that intends to become a first name.  Popular mommy blogger Rebecca Woolf of <em>Girls Gone Child</em> named one of her twin daughters Reverie, setting off a groundswell of interest.

Reverie

An attractive French word name known here via former child TV star Soleil Moon Frye, aka Punky Brewster. It started to be lightly used in the U.S. in the 1920s and is now attracting some attention as both a sunny nature and an international word name. It's currently in the Nameberry Top 500.

Soleil

Tournesol

Étoile

vintageluvs's list "Hippie Names in Disguise" of 28 great name ideas: Astre - Étoile!

Hippie Names in Disguise