Gianmarco is a distinctive boys' name in United States, ranking #3584 in 2009 with 30 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 233.3%. In 2009, approximately 1 in every 66,110 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.