Gianmarco is a distinctive boys' name in United States, ranking #4423 in 1999 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 1999, approximately 1 in every 120,005 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.