Keirstin is a distinctive girls' name in United States, ranking #4146 in 1999 with 28 recorded births. The name reached its all-time peak in 1998 with 31 births ranking #3778. Since 1996, the popularity has increased by 47.4%. In 1999, approximately 1 in every 63,349 girls born was named Keirstin. STABLE Recent data shows the name is currently stable.