Marcellus ranked #1972 among U.S. baby names in 2024. Since 1880, 9,397 babies have been named Marcellus, peaking in 2021 with 351 births. The 2020s were its biggest decade, with 1,522 births. Marcellus is on the rise, up about 63% over the past five years. It is predominantly a boys' name.