the son of Imanuentius, king of the Trinobantes in Britain, had fled to Caesar in Gaul, after his father had been killed by Cassivelaunus. On Caesar's arrival in Britain, Mandubratius obtained the supreme command in his state. (Caes. B. G. 5.20.) Orosius (6.9) calls him Androgorius.
A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890