And he was clothed with a vesture dipped in blood; and he [is] arrayed in a garment, etc. The idea here is evidently derived from Isaiah 63:3, "I have trodden the wine press alone; and of the people there was none with me: for I will tread them in mine anger, and trample them in my fury: and their blood shall be sprinkled upon my garments, and I will stain all my raiment" (cf.
Isaiah 63:15). Probably the similarity of this passage has caused the reading, "sprinkled with blood," which is found in a few manuscripts. In the original passage in Isaiah, the blood is doubtless the blood of his enemies; but it is possible that there is here a reference to the blood of Christ himself, which he shed in his warfare with Satan.
And his Name is called The Word of God. Only in St. John's writings does this title appear—a strong argument in favour of his authorship of the Apocalypse (cf. John 1:1; 1 John 1:1). This cannot be the "name" of verse 12, which, as there explained, is unknown.
This Name, the Word of God, is appropriately used when he is going forth to judgment.