Karilyn is a distinctive girls' name in United States, ranking #11979 in 1999 with 7 recorded births. The name reached its all-time peak in 2003 with 16 births ranking #7046. Since 1996, the popularity has decreased by 46.2%. In 1999, approximately 1 in every 253,397 girls born was named Karilyn. FALLING Recent data shows the name is currently falling.