1. Les Miserables:
When you take a clay impression off a manhole cover, the lettering is always reversed. It means we are inquiring backwards in time.
[Hanging ceramic plaque made by Daughter}
When he carried poor injured Marius to safety through the sewers of Paris, it advanced the plot of the story and defined Valjean as a hero who could love unselfishly, but what if he was only strong enough to carry Marius halfway through the sewer? It would just clog things up.
I think Fraternité was added after the revolution. It means getting along with each other, which is much easier to do after a revolution than while one is going on.
Liberté, means freedom, and is symbolized by Americans and French people alike as Lady Liberty.
Vegetarians eat vegetables. I am afraid to imagine what Egalitarians eat but I think it is why the French put a rooster on their coin.
The name, Marianne, means "like Marius", beloved. Both names are rooted in "Mars", the god of war. Yet both characterizations are dedicated to peace, justice and the end of confusion about roosters
4. Jean Valjean:
Jean Valjean translates literally as "John, here's John". Why give him the same name twice? We can only guess. But I suspect naming him Jean x2 was instrumental in getting him twice halfway through the sewer.