Roisin is a moderately popular girls' name in England & Wales, ranking #482 in 2008 with 82 recorded births. The name reached its all-time peak in 1997 with 158 births ranking #247. Since 1996, the popularity has decreased by 38.8%. In 2008, approximately 1 in every 3,851 girls born was named Roisin. FALLING Recent data shows the name is currently falling.