Cosette is a distinctive girls' name in United States, ranking #1554 in 2015 with 141 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 291.7%. In 2015, approximately 1 in every 12,657 girls born was named Cosette. STABLE Recent data shows the name is currently stable.