Grainne is a distinctive girls' name in United States, ranking #15146 in 2005 with 6 recorded births. This places Grainne in the bottom 21% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2002 with 9 births ranking #10512. Since 1996, the popularity has increased by 20.0%. In 2005, approximately 1 in every 307,950 girls born was named Grainne. STABLE Recent data shows the name is currently stable.