Heidy is a distinctive girls' name in United States, ranking #1115 in 2003 with 198 recorded births. The name reached its all-time peak in 2010 with 338 births ranking #809. Since 1996, the popularity has increased by 88.6%. In 2003, approximately 1 in every 9,228 girls born was named Heidy. FALLING Recent data shows the name is currently falling.