Rosalyn is a distinctive girls' name in United States, ranking #1870 in 1999 with 85 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 13.3%. In 1999, approximately 1 in every 20,868 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.