Giancarlos is a distinctive boys' name in United States, ranking #3215 in 1999 with 25 recorded births. The name reached its all-time peak in 2010 with 48 births ranking #2564. Since 1996, the popularity has increased by 257.1%. In 1999, approximately 1 in every 76,803 boys born was named Giancarlos. FALLING Recent data shows the name is currently falling.