Bar-Cochba was the leader of the Jewish uprising in Palestine, A.D. 132–135.
[The Jews] kill and punish us whenever they have the power, as you can well believe. For example, in the Jewish war that lately raged, Bar-Cochba, the leader of the revolt of the Jews, gave orders that Christians alone should be led to cruel punishments, unless they would deny Jesus Christ and utter blasphemy. Justin Martyr (c. 160, E), 1.173.