Albert Barnes Commentary Revelation 19:13

"And he [is] arrayed in a garment sprinkled with blood: and his name is called The Word of God." — Revelation 19:13 (ASV)

And he was clothed with a vesture dipped in blood. Red, as if dipped in blood—emblem of slaughter. The original source of this image is probably Isaiah 63:2-3. See Barnes on Isaiah 63:2-3.

And his name is called The Word of God. The name which, it is said in Revelation 19:12, no one knew but he himself. This name is o logov ton yeou, or "the Logos of God." That is, this is his peculiar name; a name which belongs only to him, and which distinguishes him from all other beings. The name Logos, as applicable to the Son of God, and expressive of his nature, is found in the New Testament only in the writings of John, and is used by him to denote the higher or Divine nature of the Savior. In regard to its meaning, and the reason why it is applied to him, see Barnes on John 1:1.

The reader may also consult with great advantage an article by Professor Stuart in the Bibliotheca Sacra, vol. vii., pp. 16-31. The following may be some of the reasons why it is said (Revelation 19:12) that no one understands this but he himself:

1. No one but he can understand its full import, as it implies so high a knowledge of the nature of the Deity;
2. No one but he can understand the relation which it supposes in regard to God, or the relation of the Son to the Father;
3. No one but he can understand what is implied in it, considered as the method by which God reveals himself to his creatures on earth;
4. No one but he can understand what is implied in it in respect to the manner in which God makes himself known to other worlds.

It may be added as a further illustration of this, that none of the attempts made to explain it have left the matter so that there are no questions unsolved which one would be glad to ask.