Cosette is a distinctive girls' name in United States, ranking #3026 in 2007 with 58 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 61.1%. In 2007, approximately 1 in every 33,146 girls born was named Cosette. STABLE Recent data shows the name is currently stable.