French diminutive meaning 'little thing,' widely known from Victor Hugo's Les Misérables.
Cosette is one of those rare names whose story is inseparable from literature. It comes from French chosette, often glossed as "little thing," a diminutive with a delicate, almost affectionate domestic quality. Victor Hugo used it as the nickname of Fantine's daughter in Les Misérables, though the girl's formal name in the novel is Euphrasie.
Because of Hugo, Cosette moved from the realm of a pet name into the world of given names, carried not by ancient lineage but by emotional force. Its literary associations are enormous. Cosette begins as a child of hardship and neglect under the Thénardiers and becomes, under Jean Valjean's protection, a figure of innocence, hope, and renewal.
Later adaptations, especially the globally successful stage musical, gave the name even wider reach. For many people, Cosette immediately evokes candlelight, Paris, revolution, and the tender emotional architecture of Hugo's story. In usage, Cosette has remained uncommon, which is part of its charm.
It sounds French, refined, and unmistakably narrative, more like a heroine than a trend. Parents drawn to it are often choosing not just a sound but a mood: romantic, literary, resilient. Unlike many old French names, Cosette did not travel through dynasties or saints; it entered the modern naming world through art. That gives it a special aura, as though it was born already carrying a plot.