Gianmarco is a distinctive boys' name in United States, ranking #2540 in 2004 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 2004, approximately 1 in every 46,158 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.