Gianmarco is a distinctive boys' name in United States, ranking #5690 in 2025 with 16 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 77.8%. In 2025, approximately 1 in every 106,755 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.