Why "Two Swords"?
The name comes from a biblical reference. During the Last Supper that Jesus had with His disciples, He tells His disciples to take money and purchase a sword -- even if they have to sell a garment to get one. Why? Jesus was sending His disciples out for ministry but He would no longer physically be with them. He wanted them to have a means of protection until they had accomplished their ministry or until they would be martyred in a way that would bring God glory (Luke 22:35-36).
The disciples already indicated that they had two swords and Jesus replied, "It is enough" (Luke 22:38). Some Bible scholars have twisted Jesus' words here to say that Jesus was expressing His disdain for forms of protection. But that is inconsistent with the fact that Jesus had just told them to purchase a sword. It also contradicts other biblical teachings of self-defense.