Giancarlos is a distinctive boys' name in United States, ranking #2645 in 2008 with 47 recorded births. The name reached its all-time peak in 2010 with 48 births ranking #2564. Since 1996, the popularity has increased by 571.4%. In 2008, approximately 1 in every 43,403 boys born was named Giancarlos. FALLING Recent data shows the name is currently falling.