Jocilyn is a distinctive girls' name in United States, ranking #6762 in 2010 with 19 recorded births. The name reached its all-time peak in 2009 with 28 births ranking #5148. Since 1996, the popularity has increased by 137.5%. In 2010, approximately 1 in every 93,544 girls born was named Jocilyn. STABLE Recent data shows the name is currently stable.