Keilyn is a distinctive girls' name in United States, ranking #2989 in 2012 with 57 recorded births. The name reached its all-time peak in 2009 with 63 births ranking #2813. Since 1996, the popularity has increased by 533.3%. In 2012, approximately 1 in every 30,890 girls born was named Keilyn. FALLING Recent data shows the name is currently falling.