Giancarlos is a distinctive boys' name in United States, ranking #5222 in 2001 with 14 recorded births. The name reached its all-time peak in 2010 with 48 births ranking #2564. Since 1996, the popularity has increased by 100.0%. In 2001, approximately 1 in every 138,774 boys born was named Giancarlos. FALLING Recent data shows the name is currently falling.