Sinead is a moderately popular girls' name in England & Wales, ranking #154 in 2003 with 312 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has increased by 54.5%. In 2003, approximately 1 in every 893 girls born was named Sinead. FALLING Recent data shows the name is currently falling.