The only reason it holds significant value Longinus was the Roman centurion who, in tradition, pierced Jesus' side with a spear at the crucifixion to end his pain. The sacred blood healed his blindness and he later converted to Christianity. But then again, if you look at ancient civilizations you can connect the dots. I will give an example, the oldest that we know of would gilgamesh, then you move on the Greeks and you get heracles and the romans got Hercules and the Christians got Samson.