Keirstyn is a distinctive girls' name in United States, ranking #16779 in 2019 with 5 recorded births. The name reached its all-time peak in 2008 with 27 births ranking #5366. Since 1996, the popularity has decreased by 58.3%. In 2019, approximately 1 in every 335,514 girls born was named Keirstyn. FALLING Recent data shows the name is currently falling.