Rosalyn is a distinctive girls' name in United States, ranking #1485 in 2009 with 157 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 109.3%. In 2009, approximately 1 in every 11,700 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.