Keilyn is a distinctive girls' name in United States, ranking #5003 in 2004 with 26 recorded births. The name reached its all-time peak in 2009 with 63 births ranking #2813. Since 1996, the popularity has increased by 188.9%. In 2004, approximately 1 in every 70,620 girls born was named Keilyn. FALLING Recent data shows the name is currently falling.