Joslin is a distinctive girls' name in United States, ranking #3143 in 2009 with 54 recorded births. The name reached its all-time peak in 2010 with 67 births ranking #2677. Since 1996, the popularity has increased by 157.1%. In 2009, approximately 1 in every 34,016 girls born was named Joslin. FALLING Recent data shows the name is currently falling.