Joslyn is a distinctive girls' name in United States, ranking #780 in 2003 with 317 recorded births. This places Joslyn in the top 4% of ranked US girls' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2010 with 461 births ranking #641. Since 1996, the popularity has increased by 63.4%. In 2003, approximately 1 in every 5,764 girls born was named Joslyn. FALLING Recent data shows the name is currently falling.