It really doesn't matter what it is. It does not take knowing His name to worship Him. It does not take calling Him by His name to honor Him as our God.
Is Jesus God? Yes!! Jesus was with God, and Jesus was (is) God. Jesus is the "I AM!" Jesus was God to whom Abraham spoke in the burning bush. Jesus created everything that is, and NOTHING was created that He did not create (this means that He cannot be a created being, because He cannot create Himself). So you can put either Jesus' name, or the Father's name (unknown), or His titles in those places and it makes no difference.
If you lived in a monarchy, and one of the king's soldiers knocked on your door and said, "Open in the name of the king!", are you going to answer, "What is the name of the king to whom I am supposed to open my door?" No, you are going to open the door. It doesn't matter what the name of the king is, it matters that "the name of the king" represents the soldier appropriating the authority of the king in doing his duty. And that is what we do when we baptize people into Christ, we appropriate the authority of God (with His permission and instruction) to bring another soul into His Kingdom.