Sinead is a moderately popular girls' name in England & Wales, ranking #230 in 2001 with 172 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has decreased by 14.9%. In 2001, approximately 1 in every 1,558 girls born was named Sinead. FALLING Recent data shows the name is currently falling.