Revelation 19:16; King of Kings and Lord of Lords

Revelation 19:16 (KJV)  And he hath on his vesture and on his thigh a name written, KING OF KINGS, AND LORD OF LORDS. 

That is, this name was conspicuously written on his garment—probably his military robe.

And on his thigh. The robe or military cloak may be conceived of as open and flowing, so as to expose the limbs of the rider; and the idea is, that the name was conspicuously written not only on the flowing robe, but on the other parts of his dress, so that it must be conspicuous whether his military cloak were wrapped closely around him, or whether it was open to the breeze. This name was on the edge or hilt of the sword which depended from his thigh.

A name written, a title descriptive of His character.

King of kings, and Lord of lords. As in Revelation 17:5, so here, there is nothing in the original to denote that this should be distinguished, as it is, by capital letters. As a conspicuous title, however, it is not improper. It means that He is, in fact, the sovereign over the kings of the earth, and that all nobles and princes are under his control—a rank that properly belongs to the Son of God.

Revelation 17:5 (KJV)  And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH. 

The custom here alluded to of inscribing the name or rank of distinguished individuals on their garments, so that they might be readily recognized, was not uncommon in ancient times.

 Barnes, A. (1884–1885). Notes on the New Testament: Revelation. (R. Frew, Ed.) (pp. 413–414). London: Blackie & Son.

What qualifies Jesus of Nazareth to exercise this kind of judgment? The question is answered clearly by the final title of Jesus—a title so profound that it’s actually written on His robe and His thigh: “King of kings and Lord of lords.” More than any other name for Christ in this vision, this famous title identifies Jesus as the supreme human ruler over all the earth and also as God Almighty. The following chart shows how the titles “king of kings” and “Lord of lords” are used in the Old Testament, giving us a clearer understanding of this title for Christ.

 Swindoll, C. R. (2014). Revelation (Vol. 15, p. 275). Carol Stream, IL: Tyndale House Publishers, Inc.