Karilyn is a distinctive girls' name in United States, ranking #12394 in 2015 with 8 recorded births. The name reached its all-time peak in 2003 with 16 births ranking #7046. Since 1996, the popularity has decreased by 38.5%. In 2015, approximately 1 in every 223,082 girls born was named Karilyn. FALLING Recent data shows the name is currently falling.