Conservative theologians date the gospels much earlier, and consider Matthew to have been the tax collector mentioned in that gospel. The Gnostics - The early Christian movement included Gnostics, Jewish Christians and Pauline Christians. Gnostics denied Jesus's existence as a historical person, as they believed God could never take a human form. Flavius Josephus - He was a Jewish historian who was born in 37 CE, and he described Jesus as a wise man crucified by Pilate in his book 'Antiquities of the Jews'. But most historians think that this paragraph is at least partially a forgery, inserted by an unknown Christian.
Some conservative theologians think the passage is entirely genuine.
Suetonius - Author of 'Lives of the Caesars' in about 120 CE, which refers to the expulsion from Rome of Jews who caused disturbances at the instigation of 'Chrestus'. Suetonius is probably referring to a Jewish agitator called Chrestus.