Giancarlos is a distinctive boys' name in United States, ranking #3105 in 2006 with 35 recorded births. The name reached its all-time peak in 2010 with 48 births ranking #2564. Since 1996, the popularity has increased by 400.0%. In 2006, approximately 1 in every 58,718 boys born was named Giancarlos. FALLING Recent data shows the name is currently falling.