Actually he got the French pronounciation right: zha-vair. No ja-veer, no zha-vert... lol
I like Javert (the character) too, but I can imagine the school teasings a kid would go through with such a name... "So, when are you going to jump in the Seine?", "Why won't you let
Jean Valjean alone?" and all. It's still far better than Thénardier though.