Keirstyn is a distinctive girls' name in United States, ranking #14258 in 2012 with 7 recorded births. The name reached its all-time peak in 2008 with 27 births ranking #5366. Since 1996, the popularity has decreased by 41.7%. In 2012, approximately 1 in every 251,535 girls born was named Keirstyn. FALLING Recent data shows the name is currently falling.