What name was given to the son of the man who defeated the usurper Allectus ?
Britannia Secunda:  It was probably created after the defeat of the usurper Allectus by Constantius Chlorus in  296 and was mentioned in the c. 312 Verona List of the Roman provinces. Constantius Chlorus:  He was the father of Constantine the Great and founder of the Constantinian dynasty.
Constantine the Great