Joslin is a distinctive girls' name in United States, ranking #3521 in 1998 with 34 recorded births. The name reached its all-time peak in 2010 with 67 births ranking #2677. Since 1996, the popularity has increased by 61.9%. In 1998, approximately 1 in every 51,967 girls born was named Joslin. FALLING Recent data shows the name is currently falling.