Sinead is a distinctive girls' name in England & Wales, ranking #584 in 2013 with 70 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has decreased by 65.3%. In 2013, approximately 1 in every 4,406 girls born was named Sinead. FALLING Recent data shows the name is currently falling.