Theophylact of Ohrid

Some say that one of these two was Luke himself, which is why the evangelist concealed his name.

Commentary on Luke ↗

Augustine of Hippo

"We," they said, "had hoped that he was the one to redeem Israel." O my dear disciples, you had hoped! So now you no longer hope? Look, Christ is alive! Is hope dead in you? Certainly, certainly, Christ is alive! Christ, being alive, found the hearts of his disciples dead, as he appeared and did not appear to their eyes. He was at one and the same time seen and concealed. I mean, if he wasn't seen, how could they have heard him questioning them and answered his questions? …

Sermon 235.2-3 ↗

Ambrose of Milan

Or to two of the disciples by themselves our Lord showed Himself in the evening, namely, Ammaon and Cleophas.

Catena Aurea by Aquinas ↗

Bede

And behold, two of them were going that very day to a village named Emmaus, which was about sixty stadia from Jerusalem, and they were talking with each other about all these things which had happened. A stadium, as the Greeks say, with Hercules as the author, is the measure of distances and is an eighth part of a mile; therefore, sixty stadia signify seven thousand and five hundred steps. This distance well suits those who were certain of the death and burial of the Savior, but doubtful of the resurrection. …

On the Gospel of Luke ↗