The Quintillus reference article from the English Wikipedia on 24-Apr-2004
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Quintillus

Marcus Aurelius Claudius Quintillus was brother of the Roman Emperor Claudius II, and Emperor in 270. The few records of his reign are contradictory: they disagree on the length of his reign (from a few days to a few months) and on the cause of his death. They do agree on the fact he died at Aquileia.

Preceded by:
Claudius II (270)
Roman emperors
Followed by:
Aurelian (270-275)