Rosalyn is a distinctive girls' name in United States, ranking #867 in 2018 with 313 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 317.3%. In 2018, approximately 1 in every 5,433 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.