Sinead is a distinctive girls' name in England & Wales, ranking #593 in 2010 with 66 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has decreased by 67.3%. In 2010, approximately 1 in every 4,864 girls born was named Sinead. FALLING Recent data shows the name is currently falling.