John Gill Bible Commentary

So the Heathen shall fear the name of the Lord,.... Whose name is reverend, and to be feared; especially the glorious and fearful name "Jehovah", expressive of the divine existence, of his eternity and immutability; though the name of the Lord frequently signifies himself, and here particularly the Messiah, the Son of God, in whom the name of the Lord is; the King of saints, whom all men will fear in the latter day, when the set time to favour Zion is come; will stand in awe of him, be careful of offending him, and will serve and worship him; even the very Heathen, who knew not God, and had no fear of him before their eyes, or in their hearts; the Pagan nations, whose kingdoms will become the kingdoms of our Lord, and of his Christ; see Rev 11:15. and all the kings of the earth thy glory; which may be supplied thus, either "all the kings of the earth shall see thy glory", or shall fear thee because of "thy glory"; the glory of Christ's person, as the Son of God; the glory of his offices, as Prophet, Priest, and King; especially the glory of his kingly office, to which that of the kings of the earth is not to be compared; the glory of his works of creation, providence, and redemption; and as it will be held forth in the Gospel, with which the earth will now be full, and so be filled with the glory of the Lord, Psa 72:19, and will be so remarkable and conspicuous as to be taken notice of by the kings of the earth, even by all of them, who, when the glory of the Lord shall be risen in Zion, will come to the brightness of it, and look upon it, and admire it, and fear because of it, Isa 60:1.