Cosmas Indicopleustes

And behold, I will send you Elijah the Tishbite before the great and notable day of the Lord.

The Christian Topography, Book 5 ↗

Jerome

Behold, I will send you Elijah the prophet, before the great and dreadful day of the Lord comes: and he will turn the hearts of the fathers to the children, and the hearts of the children to their fathers, lest I come and strike the earth with a curse. LXX: Behold, I will send you Elijah the Tishbite, before the great and glorious day of the Lord comes: he will turn the heart of the father to the son, and the heart of man to his neighbor; lest I come and strike the earth completely. …

Commentary on Malachi ↗

Hippolytus of Rome

But since the Savior was the beginning of the resurrection of all people, it was fitting that the Lord alone should rise from the dead, by whom too the judgment is to enter the whole world, that they who have wrestled worthily may be also crowned worthily by him, by the illustrious Arbiter. [That is, he] himself first accomplished the course, and was received into the heavens, and was set down on the right hand of God the Father, and is to be manifested again at the end of the world as judge. …

On The Antichrist 46 ↗

Victorinus of Pettau

"And I saw another angel ascending from the east, having the seal of the living God" He speaks of Elias the prophet, who is the precursor of the times of Antichrist, for the restoration and establishment of the churches from the great and intolerable persecution. …

Victorinus Commentary on the Apocalypse of the Blessed John ↗