Sinead is a distinctive girls' name in United States, ranking #4079 in 2004 with 35 recorded births. This places Sinead in the top 22% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1997 with 44 births ranking #2817. In 2004, approximately 1 in every 52,461 girls born was named Sinead. STABLE Recent data shows the name is currently stable.