Joannes Xiphilinus, epitomator of Dio Cassius, lived at Constantinople during the latter half of the 11th century AD. He was a monk and the nephew of Patriarch John VIII of Constatinople, a well-known preacher (Migne, Patrologia Graeca, cxx.).

The epitome of Dio was prepared by order of Michael Parapinaces (1071-1078), but is unfortunately incomplete. It comprises books 36-80, the period included being from the times of Pompey and Caesar down to Alexander Severus. In book 70 the reign of Antoninus Pius and the early years of Marcus Aurelius appear to have been missing in his copy, while in books 78 and 79 a mutilated original must have been used. Xiphilinus divided the work into sections, each containing the life of an emperor. He omitted the name of the consuls and sometimes altered or emended the original. The epitome is valuable as preserving the chief incidents of the period for which the authority of Die is wanting.

See H Reimar's edition of Dio Cassius, ii.; J Melber's Dio in Teubner series; C Wachsmuth, Einleitung in das Studium der alten Geschichte (1895); W Christ, Geschichte der griechischen Litteratur (1808).

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This article incorporates text from the 1911 Encyclopædia Britannica, a publication in the public domain.