John the Apostle
Revelation 19:13ESV·traditional attribution

He is clothed in a robe dipped in blood, and the name by which he is called is The Word of God.

Matthew Henry Presbyterian @wholebiblehenry

No sooner was the marriage solemnized between Christ and his church by the conversion of the Jews than the glorious head and husband of the church is called out to a new expedition, which seems to be the great battle that was to be fought at Armageddon, foretold Rev 16:16. And here observe, I. The description of the great Commander, 1.

Commenting on Revelation 19:11-21

John Gill Reformed Baptist @doctorgill

And he was clothed with a vesture dipped in blood,.... Either in his own, by which he became the Saviour of his church and people; or else in the blood of his saints, he now comes to avenge; or rather in the blood of his enemies, with which he appears as stained, before the battle is fought, the victory being sure, and their slaughter unavoidable...

Albert Barnes Presbyterian @notesbybarnes

Verse 13. And he was clothed with a vesture dipped in blood. Red, as if dipped in blood--emblem of slaughter. The original of this image is probably . . And his name is called The Word of God. The name which in it is said that no one knew but he himself.