Namesakes
Muhammad Ali
(middle name Marcellus) (m) 1942-2016 
Notable Athletes (boxing)
Marcellus I
(m) 255-309
Bishops of Rome and the Popes 308-309
Saints
Marcellus II
(m) 1501-1555
Bishops of Rome and the Popes 1555
Marcellus the Centurion
(m) ?-298
Saints
Marcellus
(m)
Shakespearian Characters Hamlet
Marcellus Washburn
(m)
Fictional Characters from Plays and Musicals 1957 The Music Man
Marcellus
(m) ?-304
Saints
Marcellus of Apamaea
(m) ?-389
Saints
Marcellus
(m) ?-510
Saints