Roisin is a distinctive girls' name in England & Wales, ranking #507 in 2006 with 73 recorded births. The name reached its all-time peak in 1997 with 158 births ranking #247. Since 1996, the popularity has decreased by 45.5%. In 2006, approximately 1 in every 4,099 girls born was named Roisin. FALLING Recent data shows the name is currently falling.