In Hebrew, “Jesus” is Yehoshua, often abbreviated “Y’shua.”
Well, if Jesus is “Yehoshua” in Hebrew, then there was a Jesus in the OT. That would be Joshua, son of Nun, the military leader who led the Israelites to wipe out the major groups of the pagans occupying the Promised Land. In fact, if you read very carefully, there are a number of interesting ways the book of Joshua reflects the book of Revelation. Both involve a military commander ousting the usurpers from the land.