Rosalyn is a distinctive girls' name in United States, ranking #1606 in 2005 with 127 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 69.3%. In 2005, approximately 1 in every 14,549 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.