Marcelus is a distinctive boys' name in United States, ranking #5768 in 2005 with 14 recorded births. The name reached its all-time peak in 1996 with 18 births ranking #3775. Since 1996, the popularity has decreased by 22.2%. In 2005, approximately 1 in every 142,653 boys born was named Marcelus. FALLING Recent data shows the name is currently falling.