J
- Januarius Nepotianus - writer
- Javolenus Priscus - jurist
- Jordanes - historian
- Flavius Jovian - emperor
- Juba I of Numidia
- Juba II of Numidia
- Juba of Mauretania
- Jugurtha - Numidian king
- Julia (aunt of Caesar and wife of Marius)
- Julia (daughter of Julius Caesar)
- Julia Caesaris - women in the Julii Caesares family
- Juliae Caesares (sisters of Julius Caesar)
- Julia Flavia - daughter of Titus
- Vipsania Julia - granddaughter of Augustus
- Julia Antonia (wife of Antonius Creticus, mother of triumvir)
- Julia the Elder, daughter of Augustus
- Julia Domna - wife of Septimius Severus
- Julia Maesa - sister of Julia Domna
- Julia Soaemias Bassiana - daughter of Julia Maesa
- Julia Avita Mamaea - younger daughter of Julia Maesa
- Flavius Claudius Julianus (Julian) - emperor
- Julianus Salvius - jurist
- Gaius Julius Bassus - Governor of Bithynia-Pontus
- Julius Caesar - general and dictator
- Lucius Julius Libo - consul and ancestor to Julius Caesar
- Julius Canus - philosopher
- Julius Cerealis - poet
- Sextus Julius Gabinianus - rhetor
- Julius Modestus - freedman of Hyginus
- Julius Romanus - grammarian
- Julius Tiro - rhetor
- Julius Valerius Alexander Polemius - writer
- Gaius Julius Victor - writer
- Junius Congus - writer
- Marcus Junius Nipsus - grammarian
- Junius Otho - praetor
- Justin Martyr - writer and martyr
- Justinian I - emperor
- Marcus Justinianus Justinus (Justin) - writer
- Decimus Iunius Iuvenalis (Juvenal) - poet
- Gaius Vettius Aquilinus Juvencus - Christian poet
- Marcus Juventius Laterensis - praetor
Read more about this topic: List Of Ancient Romans