Joselyn is a moderately popular girls' name in United States, ranking #409 in 2005 with 762 recorded births. The name reached its all-time peak in 2007 with 1,577 births ranking #221. Since 1996, the popularity has increased by 138.9%. In 2005, approximately 1 in every 2,425 girls born was named Joselyn. FALLING Recent data shows the name is currently falling.