Rosalyn is a distinctive girls' name in United States, ranking #860 in 2019 with 312 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 316.0%. In 2019, approximately 1 in every 5,377 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.