Joselyn is a moderately popular girls' name in United States, ranking #336 in 2009 with 980 recorded births. The name reached its all-time peak in 2007 with 1,577 births ranking #221. Since 1996, the popularity has increased by 207.2%. In 2009, approximately 1 in every 1,874 girls born was named Joselyn. FALLING Recent data shows the name is currently falling.