Joslyn is a distinctive girls' name in United States, ranking #1070 in 2018 with 238 recorded births. The name reached its all-time peak in 2010 with 461 births ranking #641. Since 1996, the popularity has increased by 22.7%. In 2018, approximately 1 in every 7,145 girls born was named Joslyn. FALLING Recent data shows the name is currently falling.