Rosalyn is a distinctive girls' name in United States, ranking #832 in 2021 with 332 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 342.7%. In 2021, approximately 1 in every 4,939 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.