Rosalyn is a distinctive girls' name in United States, ranking #1051 in 2025 with 237 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 216.0%. In 2025, approximately 1 in every 6,782 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.