Roisin is a distinctive girls' name in England & Wales, ranking #1166 in 2025 with 28 recorded births. The name reached its all-time peak in 1997 with 158 births ranking #247. Since 1996, the popularity has decreased by 79.1%. In 2025, approximately 1 in every 9,046 girls born was named Roisin. FALLING Recent data shows the name is currently falling.