Gianmarco is a distinctive boys' name in United States, ranking #4266 in 2011 with 23 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 155.6%. In 2011, approximately 1 in every 82,565 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.