Keilyn is a distinctive girls' name in United States, ranking #3698 in 2006 with 42 recorded births. The name reached its all-time peak in 2009 with 63 births ranking #2813. Since 1996, the popularity has increased by 366.7%. In 2006, approximately 1 in every 45,264 girls born was named Keilyn. FALLING Recent data shows the name is currently falling.