Heidy is a distinctive girls' name in United States, ranking #1346 in 2001 with 143 recorded births. The name reached its all-time peak in 2010 with 338 births ranking #809. Since 1996, the popularity has increased by 36.2%. In 2001, approximately 1 in every 12,591 girls born was named Heidy. FALLING Recent data shows the name is currently falling.