Could Marcellus be the perfect name for your baby boy? The baby boy name Marcellus is 9 letters long, and contains 3 vowel(s) and 6 consonant(s). Marcellus is a baby boy name that starts with the letter M and ends in the letter S. The baby boy name Marcellus has a popularity of 26% and is ranked 741 in the list of top 1000 most popular baby boy names. If Marcellus isn't the ideal name for your baby boy then take a look here for some randomly generated names. Hopefully you'll find a more suitable first name for your baby boy than Marcellus!