Cosette is a distinctive girls' name in United States, ranking #3195 in 2003 with 46 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 27.8%. In 2003, approximately 1 in every 39,718 girls born was named Cosette. STABLE Recent data shows the name is currently stable.