Karilyn is a distinctive girls' name in United States, ranking #7238 in 2002 with 15 recorded births. The name reached its all-time peak in 2003 with 16 births ranking #7046. Since 1996, the popularity has increased by 15.4%. In 2002, approximately 1 in every 119,788 girls born was named Karilyn. FALLING Recent data shows the name is currently falling.