Karolyn is a distinctive girls' name in United States, ranking #5009 in 2009 with 29 recorded births. The name reached its all-time peak in 1997 with 52 births ranking #2493. Since 1996, the popularity has decreased by 21.6%. In 2009, approximately 1 in every 63,340 girls born was named Karolyn. RISING Recent data shows the name is currently rising.