Sinead is a moderately popular girls' name in England & Wales, ranking #255 in 2002 with 155 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has decreased by 23.3%. In 2002, approximately 1 in every 1,725 girls born was named Sinead. FALLING Recent data shows the name is currently falling.