Jocilyn is a distinctive girls' name in United States, ranking #7947 in 1999 with 12 recorded births. The name reached its all-time peak in 2009 with 28 births ranking #5148. Since 1996, the popularity has increased by 50.0%. In 1999, approximately 1 in every 147,815 girls born was named Jocilyn. STABLE Recent data shows the name is currently stable.