Sinead is a moderately popular girls' name in England & Wales, ranking #390 in 2007 with 106 recorded births. The name reached its all-time peak in 2003 with 312 births ranking #154. Since 1996, the popularity has decreased by 47.5%. In 2007, approximately 1 in every 2,888 girls born was named Sinead. FALLING Recent data shows the name is currently falling.