Cortlyn is a distinctive girls' name in United States, ranking #5966 in 1999 with 17 recorded births. The name reached its all-time peak in 2006 with 21 births ranking #6184. Since 1996, the popularity has increased by 21.4%. In 1999, approximately 1 in every 104,340 girls born was named Cortlyn. FALLING Recent data shows the name is currently falling.