Cosette is a distinctive girls' name in United States, ranking #1778 in 2013 with 115 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 219.4%. In 2013, approximately 1 in every 15,256 girls born was named Cosette. STABLE Recent data shows the name is currently stable.