Cosette is a distinctive girls' name in United States, ranking #1819 in 2018 with 112 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 211.1%. In 2018, approximately 1 in every 15,182 girls born was named Cosette. STABLE Recent data shows the name is currently stable.