Gianmarco is a distinctive boys' name in United States, ranking #4840 in 2016 with 20 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 122.2%. In 2016, approximately 1 in every 94,861 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.