Cortlyn is a distinctive girls' name in United States, ranking #8146 in 2000 with 12 recorded births. The name reached its all-time peak in 2006 with 21 births ranking #6184. Since 1996, the popularity has decreased by 14.3%. In 2000, approximately 1 in every 151,331 girls born was named Cortlyn. FALLING Recent data shows the name is currently falling.