Grainne is a distinctive girls' name in United States, ranking #14482 in 2003 with 6 recorded births. The name reached its all-time peak in 2002 with 9 births ranking #10512. Since 1996, the popularity has increased by 20.0%. In 2003, approximately 1 in every 304,508 girls born was named Grainne. STABLE Recent data shows the name is currently stable.