Rosalyn is a distinctive girls' name in United States, ranking #1138 in 2015 with 223 recorded births. The name reached its all-time peak in 2021 with 332 births ranking #832. Since 1996, the popularity has increased by 197.3%. In 2015, approximately 1 in every 8,003 girls born was named Rosalyn. STABLE Recent data shows the name is currently stable.