Domitius Alexander in Wikipedia
Lucius Domitius Alexander (d. ca. 311), probably born in
Phrygia, was vicarius of Africa when Emperor Maxentius
ordered him to send his son as hostage to Rome. Alexander
refused and proclaimed himself emperor in 308.
The most detailed if somewhat confusing description of the
insurrection is given by Zosimos (II, 12 and 14). He reports
that Maxentius sent his portrait to Africa to gain
recognition as emperor there. The troops resisted because of
their loyalty to Galerius. Maxentius ordered Domitius
Alexander, the governor of the province, to send his son to
Rome to secure his loyalty. Alexander refused and was
crowned emperor by his army. The incident was probably
caused by the conflict between Maxentius and his father
Maximian early in 308, and Zosimos confused Galerius with
Maximian in his account.
Apart from the province of Africa, Domitius Alexander also
controlled Sardinia. At the time of his accession, he was
already at an advanced age. There is evidence in an
inscription (CIL viii, 22183) that Alexander and Constantine
I allied themselves in opposition to Maxentius. Salama
suggests that, at the latest, the pact was entered into by
autumn of 310.
Maxentius sent his praetorian prefect Rufius Volusianus and
a certain Zenas to quell the rebellion, and Alexander was
taken prisoner and then executed by strangulation.
Apparently, his troops did not offer much resistance.
Maxentius retaliated with confiscations of the property of
alleged supporters of Alexander. The year of the end of
Alexander's reign is subject to debate; dates ranging from
309 to 311 have been proposed.
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