Jocilyn is a distinctive girls' name in United States, ranking #7946 in 2001 with 13 recorded births. The name reached its all-time peak in 2009 with 28 births ranking #5148. Since 1996, the popularity has increased by 62.5%. In 2001, approximately 1 in every 138,505 girls born was named Jocilyn. STABLE Recent data shows the name is currently stable.