Keilyn is a distinctive girls' name in United States, ranking #5316 in 1997 with 19 recorded births. This places Keilyn in the top 33% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 63 births ranking #2813. Since 1996, the popularity has increased by 111.1%. In 1997, approximately 1 in every 91,614 girls born was named Keilyn. FALLING Recent data shows the name is currently falling.