Cassivellaunus then led the British defence against the Romans, but the Trinovantes betrayed the location of his fortress to Caesar, who proceeded to besiege him there.
[1] He appears in Geoffrey of Monmouth's Historia Regum Britanniae (1136) as Androgeus, eldest son of the legendary king Lud.
[2] Bede, who follows Orosius almost verbatim for his account of Caesar's expeditions, calls him "Andragius"[3] (a name which Geoffrey used for an earlier British king).
Androgeus was made Duke of Trinovantum (London) and Kent, and participated in the defence of Britain against Julius Caesar.
After Caesar's first two invasions were repelled, the Britons held a celebration at which sacrifices were made to the gods and games played.