Rosalyn is a distinctive girls' name in United States, ranking #848 in 2020 with 322 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 329.3%. In 2020, approximately 1 in every 5,017 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.