Keilyn is a distinctive boys' name in United States, ranking #7863 in 2014 with 10 recorded births. The name reached its all-time peak in 2011 with 20 births ranking #4751. Since 1996, the popularity has increased by 66.7%. In 2014, approximately 1 in every 192,044 boys born was named Keilyn. FALLING Recent data shows the name is currently falling.