Cosette is a French name meaning, affectionately, a little thing — a small, cherished one. It is forever linked to Victor Hugo's Les Misérables, whose gentle heroine grows from a mistreated child into a symbol of hope and love.
For families who love a name with a story, Cosette is small, lovely and unforgettable.
Cosette does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
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In Pythagorean numerology the letters of Cosette reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.