Heidy is a distinctive girls' name in United States, ranking #1482 in 2000 with 124 recorded births. This places Heidy in the top 8% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2010 with 338 births ranking #809. Since 1996, the popularity has increased by 18.1%. In 2000, approximately 1 in every 14,645 girls born was named Heidy. FALLING Recent data shows the name is currently falling.