Family tree of Roman emperors

27 BC – AD 192

The emperors from Augustus to Commodus can be organised into one large family tree with one non-related emperor (Galba).

192–235

The emperors from Pertinax to the beginning of the Crisis can be organised into one large dynasty (see Severan dynasty family tree), one smaller family and two unrelated emperors.

235–284, Crisis of the 3rd Century

The emperors during the fifty-year period of the Crisis can be organised into seven families and seven unrelated emperors, although no family held power for more than fifteen years.

284–518

The emperors from the founding of the Dominate in 284, in the West until 476 and in the East until 518, can be organised into one large dynasty plus ten unrelated emperors.