I mean, chronologically, that would make Feuilly a bit too old, but what if Valjean’s sister survives and has other children later in life? And she told them about her brother whom she never saw again after he tried to save her from starvation? And Feuilly grows up with these stories, until his mother dies when he’s around five, and he’s sent to an orphanage.
His mother’s stories about injustice and people getting punished for doing the right thing fuel him. Feuilly grows up wanting to change things, so that people won’t have to grow up in poverty like he did.
The night of the barricade, in the midst of a long lull, the calm bfore the storm, he finds himself smoking Combeferre’s pipe next to Valjean, though he doesn’t know his name.
“What makes you want to be here, boy?” Feuilly is hardly a boy. But, perhaps, in the eyes of an old man, he is.
“My mother. My uncle. He was arrested because he stole a loaf of bread to feed my mother and my sister. It was brave of him, and he paid an unfair price for a fair action. I don’t want it to happen ever again.”
Valjean looks at the boy, his heart beating in his chest. He recognises that jaw line. He sees the same in the mirror.
A few hours later, Feuilly’s green eyes have lost their light. That’s one more thing Valjean will blame himself for.