Giancarlos is a distinctive boys' name in United States, ranking #2564 in 2010 with 48 recorded births. The name reached its all-time peak in 2010 with 48 births ranking #2564. Since 1996, the popularity has increased by 585.7%. In 2010, approximately 1 in every 39,967 boys born was named Giancarlos. FALLING Recent data shows the name is currently falling.