Cosette is a distinctive girls' name in United States, ranking #2485 in 2000 with 61 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 69.4%. In 2000, approximately 1 in every 29,770 girls born was named Cosette. STABLE Recent data shows the name is currently stable.