Iustinianus (died 407 AD) was a Roman military commander who supported the usurper Constantine III.
In 407 the general Claudius Constantine (Constantine III) rebelled against Emperor Honorius and appointed Iustinianus and Nebiogastes magistri militum of the army of Gaul.
[1] Constantine crossed the Channel and attacked the troops loyal to Honorius in Gaul.
Iustinianus fought against Sarus, one of Honorius' generals, but was defeated and killed.
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