Nennius was a legendary leader of the Britons as accounted by Geoffrey of Monmouth. He was the second son of King Heli and brother of King Lud. He was a leader during the Roman invasion of Britain in 54 BC. With the help of Androgeus, he fought through the Roman lines and met Julius Caesar in hand-to-hand combat. Caesar hit Nennius on the helmet before getting his sword wedged in Nennius's shield. Nennius used Caesar's sword for the rest of the battle and killed many soldiers. After the Romans fled, however, Nennius fell ill from wounds and died fifteen days later. They buried him in London near the north gate with Caesar's sword, which they called Yellow Death.