Keilyn is a distinctive girls' name in United States, ranking #4606 in 2025 with 30 recorded births. The name reached its all-time peak in 2009 with 63 births ranking #2813. Since 1996, the popularity has increased by 233.3%. In 2025, approximately 1 in every 53,576 girls born was named Keilyn. FALLING Recent data shows the name is currently falling.