Julius Segimundus was a nobleman of the Germanic Cherusci, a son of Segestes who was a close ally of the Roman Empire.
After Arminius began an uprising against the Romans in AD 9, Segimundus sided with the rebels after allegedly tearing his priestly garland from his head.
[1] In 15, after the Battle of the Teutoburg Forest, Segestes and Segimundus were besieged by Arminius.
Segestes then sent Segimundus as part of a delegation to the Roman army leader Germanicus, in hope for support against Arminius.
In 17, Segimundus, his sister Thusnelda, wife of Arminius, and her son Thumelicus were part of the triumph of Germanicus in Rome.