Giancarlos is a distinctive boys' name in United States, ranking #3044 in 2007 with 38 recorded births. The name reached its all-time peak in 2010 with 48 births ranking #2564. Since 1996, the popularity has increased by 442.9%. In 2007, approximately 1 in every 54,611 boys born was named Giancarlos. FALLING Recent data shows the name is currently falling.