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Publius Aelius Hilarianus (2nd century), Roman politician, probably the governor in the
Passion of Saints Perpetua and Felicity • (2nd century), Roman military commander •
Mecilius Hilarianus (fl. 316–354), prefect of Rome and praetorian prefect of Italy • (fl. 377–396), prefect of Rome and praetorian prefect of Italy •
Decimius Hilarianus Hesperius (4th century), Roman politician •
Caelius Hilarianus (fl. 377), Roman senator and priest •
Hilarianus (magister officiorum) (fl. 470) •
Quintus Julius Hilarianus (fl. 397), Roman historian and millenarian writer • (d. 793), Catholic priest purportedly martyred by the Saracens ==Other==