Joslyn is a distinctive girls' name in United States, ranking #2732 in 2025 with 63 recorded births. The name reached its all-time peak in 2010 with 461 births ranking #641. Since 1996, the popularity has decreased by 67.5%. In 2025, approximately 1 in every 25,512 girls born was named Joslyn. FALLING Recent data shows the name is currently falling.