Marcielo is a distinctive boys' name in United States, ranking #11799 in 2024 with 6 recorded births. This places Marcielo in the bottom 17% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 10 births ranking #8018. In 2024, approximately 1 in every 285,886 boys born was named Marcielo. STABLE Recent data shows the name is currently stable.