Heidy is a distinctive girls' name in United States, ranking #1013 in 2007 with 262 recorded births. The name reached its all-time peak in 2010 with 338 births ranking #809. Since 1996, the popularity has increased by 149.5%. In 2007, approximately 1 in every 7,338 girls born was named Heidy. FALLING Recent data shows the name is currently falling.