Karilyn is a distinctive girls' name in United States, ranking #7046 in 2003 with 16 recorded births. The name reached its all-time peak in 2003 with 16 births ranking #7046. Since 1996, the popularity has increased by 23.1%. In 2003, approximately 1 in every 114,191 girls born was named Karilyn. FALLING Recent data shows the name is currently falling.