Josephus

“About this time lived Jesus, a wise man, if indeed one ought to call him a man. For he was the achiever of extraordinary deeds and was a teacher of those who accept the truth gladly. He won over many Jews and many of the Greeks. He was the Messiah. When he was indicted by the principle men among us and Pilate condemned him to be crucified, those who had come to love him originally did not cease to do so; for he appeared to them on the third day restored to life, as the prophets of the Deity had foretold these and countless other marvellous things about Him. And the tribe of Christians, so named after Him, has not disappeared to this day.”
― Josephus, Jewish Antiquities