Heidy is a distinctive girls' name in United States, ranking #1483 in 1998 with 115 recorded births. This places Heidy in the top 9% 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. In 1998, approximately 1 in every 15,364 girls born was named Heidy. FALLING Recent data shows the name is currently falling.