Gianmarco is a distinctive boys' name in United States, ranking #3136 in 1998 with 25 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 177.8%. In 1998, approximately 1 in every 76,453 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.