Gianmarco is a distinctive boys' name in United States, ranking #2779 in 2015 with 43 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 377.8%. In 2015, approximately 1 in every 44,564 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.