Keirstyn is a distinctive girls' name in United States, ranking #4915 in 2001 with 24 recorded births. The name reached its all-time peak in 2008 with 27 births ranking #5366. Since 1996, the popularity has increased by 100.0%. In 2001, approximately 1 in every 75,023 girls born was named Keirstyn. FALLING Recent data shows the name is currently falling.