Roisin is a distinctive girls' name in England & Wales, ranking #832 in 2014 with 46 recorded births. The name reached its all-time peak in 1997 with 158 births ranking #247. Since 1996, the popularity has decreased by 65.7%. In 2014, approximately 1 in every 6,667 girls born was named Roisin. FALLING Recent data shows the name is currently falling.