Rosalyn is a distinctive girls' name in United States, ranking #1518 in 2010 with 148 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 97.3%. In 2010, approximately 1 in every 12,009 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.