Roisin is a distinctive girls' name in United States, ranking #4806 in 2001 with 25 recorded births. The name reached its all-time peak in 2025 with 64 births ranking #2716. Since 1996, the popularity has increased by 56.3%. In 2001, approximately 1 in every 72,022 girls born was named Roisin. RISING Recent data shows the name is currently rising.