Kierstyn is a distinctive girls' name in United States, ranking #8622 in 2025 with 12 recorded births. This places Kierstyn in the top 50% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 135 births ranking #1649. Since 1996, the popularity has decreased by 85.2%. In 2025, approximately 1 in every 133,939 girls born was named Kierstyn. RISING Recent data shows the name is currently rising.