Jocilyn is a distinctive girls' name in United States, ranking #8315 in 2008 with 15 recorded births. The name reached its all-time peak in 2009 with 28 births ranking #5148. Since 1996, the popularity has increased by 87.5%. In 2008, approximately 1 in every 126,048 girls born was named Jocilyn. STABLE Recent data shows the name is currently stable.