The interpretation timeline
2 Corinthians 8:19 Douay-Rheims

And not that only, but he was also ordained by the churches companion of our travels, for this grace, which is administered by us, to the glory of the Lord, and our determined will:

A.D. 407 – 1871 6 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“Then he makes him respected also from the judgment of those that had chosen him. And this too is no light matter. Therefore after saying, "Whose praise in the Gospel is spread through all the churches," he added, "And not only so." What is, "and not only so?" 'Not only on this account,' he says, 'is respect due to him, that he is approved as a preacher and is praised by all.' "But he was also appointed by the churches along with us." Whence it seems to me, that Barnabas is the person intimated. And he signifies his dignity to be great, for he shows also for what office he was appointed. For he saith, "To travel with us in the matter of this grace which is ministered by us." Seest thou how great are these praises of him? He shone as a preacher of the Gospel and had all the churches testifying to this. He was chosen by us; and unto the same office with Paul, and everywhere was partner with him, both in his trials and in his dangers, for this is implied in the word "travel." But what is, "with this grace which is ministered by us?" So as to proclaim the word, he means, and to preach the Gospel; or to minister also in respect of the money; yea rather, he seems to me to refer to both of these. Then he adds, "To the glory of the same Lord, and to show your readiness." What he means is this: 'We thought good,' he says, 'that he should be chosen with us and be appointed unto this work, so as to become a dispenser and a minister of the sacred money.' Nor was this a little matter. For, "Look ye out," it saith, "from among you seven men of good report;" and he was chosen by the churches, and there was a vote of the whole people taken.”
Source

Scholastic

c. 1100 – 1500
1272
A.D.
Thomas Aquinas Catholic
1225–1274
“After he has treated of the giving of the collections, here he consequently treats of the ministers through whom the collections are made. And concerning this he does two things. First he names them; second he commends them to the Corinthians, at "the showing therefore which is," etc. Concerning the first he does three things. For first he names Titus; second Barnabas, at "we have also sent with him the brother," etc.; third Apollo, at "we have sent with them," etc. Concerning Titus he commends two things, namely his solicitude and the sign of his solicitude, at "for indeed the exhortation," etc. He says therefore first: I have said, above, that I asked Titus to complete this grace concerning the gathering of alms, which is incumbent upon my solicitude by the ordination of the apostles, in which matter I also found him solicitous; and therefore I give thanks to God, who gave the same solicitude, which I have, for you, to be exhorted and advanced to works of mercy, in the heart of Titus; because he too is solicitous, just as I am, that he may complete this grace in you. Heb. 6:11: we desire each one of you to show the same solicitude, etc. Rom. 12:8: he who presides, in solicitude. Now the sign of this solicitude is that when I asked him, he himself consented to my exhortation. And therefore he says: for indeed he received the exhortation. And because he pursued what I asked, whence he says: but since he was more solicitous by his own will than by my exhortation, he set out to you; who nevertheless at first refused to come on account of your sins. Rom. 12:11: in solicitude, not slothful. Consequently, when he says "but we have sent," etc., he treats of the second minister. And concerning this he does two things. First he commends him; second he adds the reason why he sends such solemn messengers, at "avoiding," etc. This brother, according to some, is Luke, or according to others Barnabas, whom indeed he commends from three things: from fame, because his praise, namely Luke's, is in the Gospel written by him throughout all the Churches, because it has been approved by the apostles. Or whose praise, namely Barnabas's, is in the Gospel preached by him throughout all the Churches, because to the Jews and to the Gentiles. Whence it is said of Barnabas, Acts 11:24, that he was a good man, full of faith and the Holy Spirit. Likewise he commends him from his companionship, because he is not only famous, but has also been appointed by the Churches of Judea as a companion of my pilgrimage, that is, of my preaching, by which, as pilgrims, we go about the world. Above ch. 5:6: as long as we are in the body, we are pilgrims from God, etc. And this is true of Luke, because he was one of the seventy-two disciples, and a companion of Paul. Of Barnabas likewise, because through the Holy Spirit it is said, Acts 13:2: separate for me Barnabas and Paul unto the work, etc. And he was made a companion in this grace, namely of the collection of alms. Or in this grace, namely of preaching, of which it is said Eph. 3:8: but to me, the least of all the saints, etc. Likewise he commends him from office, because he is a minister of the grace which is ministered by us. 1 Cor. 4:1: so let a man esteem us. Above ch. 3:6: who also has made us fit, etc. Now this grace is ministered unto the glory of the Lord, that is, that our Lord may be glorified, namely from the alms given, from the conversion of very many peoples to our preaching, because, as it is said Prov. 14:28, in the multitude of the people, etc. Likewise it is ministered, that our will may be fulfilled, because we wish this to be done. And therefore he says: and our will, destined — that is, predestined by God, who predestined from eternity that we should have such a will. Consequently, when he says "avoiding," etc., he assigns the cause why he sends such solemn messengers. And first he assigns the reason for this; second he proves it, at "we provide therefore," etc. He says therefore: the reason why we send such solemn messengers is this: that you may know that a business of this kind is present to our heart. And therefore he says "avoiding this," namely lest anyone, etc., as if to say: that we might avoid the reproach which could be cast upon me by some, either of negligence, if I did not send diligent men, or of fraud, if I did not send trustworthy ones. And these were diligent and ready and trustworthy, because they were given by the Churches and chosen through the Holy Spirit. Above ch. 6:3: giving no offense to anyone, etc. Now he says "in this abundance," namely of alms or of the conversion of the Gentiles. 1 Pet. 4:10: each one, as he has received grace, unto one another, etc. And he proves this, saying "for we provide," etc., as if to say: I rightly say "avoiding," because we provide — that is, we ought to provide — good things, that is, that our works may be good not only before God, that we may please him, but also before men, that is, that they may appear good to them. And this he does, by carefully procuring and imitating the good. Rom. 12:9: cleaving to the good, etc. Consequently, when he says "but we have sent with them our brother also," etc., he treats of the third messenger, namely of Apollo. Where he does two things. First, he commends him for his solicitude, when he says "whom," namely Apollo, "we have often proved to be solicitous for your salvation; but now much more solicitous." For, as appears above, Apollo was the first who preached at Corinth after the apostle. 1 Cor. 3:6: I planted, Apollo watered. But this man, disturbed by their sin, withdrew, and set aside the solicitude which he had before had for them. But now, having heard of their conversion, he became more solicitous for their salvation than he had been before. Eph. 4:3: solicitous to keep the unity of the spirit, etc. Rom. 12:8: he who presides, in solicitude, etc. Second, he adds the cause of the solicitude which he took up, because Apollo trusted concerning you from those things which Titus said about you, commending you. Whence he says "with much confidence in you," whether on account of Titus who is my companion, and because he willingly came into the fellowship of Titus and Luke or Barnabas, and because he was induced to this by the apostles of the Churches which are in Judea. And therefore he says "or our brethren," the apostles of the Churches of Judea, namely they induced him to have solicitude for you. Which Churches indeed are "of the glory of Christ," that is, unto the glory of Christ. Consequently, when he says "the showing therefore which is," etc., he commends these messengers to the Corinthians, saying: because we have sent such men to you, therefore "the showing," etc., that is, show by deed, that you have charity toward them, and that I have truly commended you, and that I have truly gloried concerning you in the face of the Churches, to which I have come and to which I have preached. Or "in the face of all the Churches," because what you do to them will become known to all the Churches.”

Reformation

c. 1500 – 1650
1637
A.D.
1567–1637
“But who was also chosen of the churches . For this work of grace of collecting the alms of the Church: The word rendered here chosen is x €l P 0T0V7 J^ ***> ordained by imposition of hands — consecrated either deacon or priest It was the deacon’s office to have care of the poor, and to distribute the alms to them ; but the priest’s to help the Apostle on his journeys in preaching and administration of the sacraments. The sacrament of Order is called by the Greeks x €l P° roy “ h fr° ra the imposition of the Bishop’s hands on the ordinands. C£ 1 Tim. iv. 14; v. 22 ; Acts xiv. 22. From this it is evident that to lay hands on presbyters is to ordain them, and by ordaining to make them presbyters. Which is administered by us to the glory of the same Lord. The Latin version reads, in the last clause of this verse, “to our destined mind ; ” the meaning of this is, to show the readiness of our mind in this pious service to God and the poor. The Greek is irpo$vfua, “ Destined,” therefore, as S. Thomas remarks, does not here mean “predestinated by God,” but ready, prompt, and cheerful. But the THE MODE OF COLLECTION 1 2 1 Greek MSS. give your, not our. We have received, says S. Paul, this grace, this ministry of almsgiving, to glorify God by it, and to make you more ready for it by the exhortations of Titus and Luke (Theophylact)”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Avoiding this, that no man should blame us,.... There is an allusion in these words to mariners, who, when sensible of danger, steer their course another way, in order to shun a rock and secure themselves. So the apostles being aware of the censorious spirits of some persons, and to prevent all suspicion of their converting any part of what they had collected to their own private use, sent Titus with it, a man of known probity and integrity; and he not by himself only, but another brother with him, one who had obtained a good report as a minister of the Gospel in all the churches: and, besides, was appointed not by the apostles, but by the churches themselves, to this service. This shows the good conduct, and great prudence of the apostle, and his care and solicitude that the ministry be not blamed; he knew he had many enemies, and how subject such are to suspicion and jealousy, when persons are intrusted with much, which was the case here; for it is added, in this abundance which is administered by us: which designs the very large contributions which were made by the churches, through the means of the apostle's moving, exciting, and encouraging them thereunto; and which were committed to their care and trust, and at their entreaty they had accepted of.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Chosen of the Churches to travel with us - Χειροτονηθεις· Appointed by a show of hands; from χειρ the hand, and τεινω, to extend. This appointment, by the suffrage of the Churches, seems to refer more to St. Luke than any one else; unless we suppose he refers to the transaction, Act 15:40, Act 15:41, and then it would appear that Silas is the person intended. With this grace - Liberal contribution. See on Co2 8:1 (note). Your ready mind - Your willingness to relieve them. But, instead of ὑμων, your, ἡμων, our, is the reading of almost all the best MSS. and all the versions. This is, doubtless, the reading.”
Source
1871
A.D.
1871
“not that only--not only praised in all the churches. chosen--by vote: so the Greek. of the churches--therefore these companions of Paul are called "messengers of the churches" (Co2 8:23). to travel--to Jerusalem. with this grace--Greek, "in the case of this grace," or "gift." to the glory of the same Lord--The oldest manuscripts omit "same." declaration of your ready mind--The oldest manuscripts read, "our," not your. This and the previous clause, "to the glory of the same Lord," do not follow "administered by us," but "chosen of the churches to travel," &c. The union of the brother with Paul in this affair of the collection was done to guard against suspicions injurious "to the glory" of the Lord. It was also done in order to produce a "readiness" on the part of Paul and the brother to undertake the office which each, by himself, would have been less ready to undertake, for fear of suspicions arising (Co2 8:20) as to their appropriation of any of the money.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.