Cosette is a distinctive girls' name in United States, ranking #2647 in 1999 with 53 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 47.2%. In 1999, approximately 1 in every 33,468 girls born was named Cosette. STABLE Recent data shows the name is currently stable.