Marcelo is a moderately popular boys' name in United States, ranking #399 in 2025 with 798 recorded births. The name reached its all-time peak in 2025 with 798 births ranking #399. Since 1996, the popularity has increased by 408.3%. In 2025, approximately 1 in every 2,140 boys born was named Marcelo. RISING Recent data shows the name is currently rising.