Kierstan is a distinctive girls' name in United States, ranking #4515 in 2001 with 27 recorded births. This places Kierstan in the top 25% 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. In 2001, approximately 1 in every 66,687 girls born was named Kierstan. FALLING Recent data shows the name is currently falling.