Karilyn is a distinctive girls' name in United States, ranking #10766 in 2011 with 10 recorded births. The name reached its all-time peak in 2003 with 16 births ranking #7046. Since 1996, the popularity has decreased by 23.1%. In 2011, approximately 1 in every 175,880 girls born was named Karilyn. FALLING Recent data shows the name is currently falling.