Sinead is a moderately popular girls' name in England & Wales, ranking #316 in 2006 with 139 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has decreased by 31.2%. In 2006, approximately 1 in every 2,153 girls born was named Sinead. FALLING Recent data shows the name is currently falling.