Kierstyn is a distinctive girls' name in United States, ranking #1649 in 2007 with 135 recorded births. The name reached its all-time peak in 2007 with 135 births ranking #1649. Since 1996, the popularity has increased by 66.7%. In 2007, approximately 1 in every 14,240 girls born was named Kierstyn. RISING Recent data shows the name is currently rising.