Cosette is a distinctive girls' name in United States, ranking #2194 in 2012 with 86 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 138.9%. In 2012, approximately 1 in every 20,474 girls born was named Cosette. STABLE Recent data shows the name is currently stable.