Kierstan is a distinctive girls' name in United States, ranking #15074 in 2017 with 6 recorded births. This places Kierstan in the bottom 18% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 31 births ranking #3782. Since 1996, the popularity has decreased by 77.8%. In 2017, approximately 1 in every 287,646 girls born was named Kierstan. FALLING Recent data shows the name is currently falling.