That's an interesting idea! Hmm, maybe using names that can be found in literature and history, especially more fanciful stuff, or famous surnames as first names? Like
Eponine,
Haydée,
Cosette,
Colette,
Antoinette, Javert,
Fantine,
Marius,
Hermine,
Albine, Matisse, Cézanne,
Héloïse, Abélard,
Gaspard? Or popular names given a very obvious French treatment, like insisting on
Chloé,
Léo,
Aimée,
Maximilien,
Sébastien, etc.
Or perhaps names that are considered very old fashioned and uncool by modern French standards, but very glamorous and Super French to non French people, like
Étienne,
Marie,
Sylvie,
Pierre, etc? I remember I once told my French coworker how handsome and exotic I thought
Étienne was and she wrinkled her nose and said "What a boring name, it's just STEVE".