Sinead is a distinctive girls' name in England & Wales, ranking #522 in 2012 with 81 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has decreased by 59.9%. In 2012, approximately 1 in every 3,976 girls born was named Sinead. FALLING Recent data shows the name is currently falling.