Jocilyn is a distinctive girls' name in United States, ranking #6617 in 2004 with 18 recorded births. The name reached its all-time peak in 2009 with 28 births ranking #5148. Since 1996, the popularity has increased by 125.0%. In 2004, approximately 1 in every 102,007 girls born was named Jocilyn. STABLE Recent data shows the name is currently stable.