And in his name shall the Gentiles trust Instead of these words the prophet has, The isles shall wait for his law. But though Matthew has changed the words, the meaning is the same, that the grace of Christ will be shared by the Gentiles.

And in his name - The Hebrew in Isaiah is, "And the isles shall wait for his law." The idea is, however, the same.
The "isles" denote the Gentiles, or a part of the Gentiles - those out of Judea. The meaning is, that the gospel should be preached to the Gentiles, and that they should receive it. See the notes at Isaiah 41:1 for an explanation of the word "islands," as it is used in the Bible.

And in his name shall the Gentiles trust - Ελπιουσι, they shall hope. Jesus Christ is the sole hope and trust of mankind; to trust and hope in his name, Jesus, is to expect salvation and all things necessary from him alone, to despise, comparatively, all earthly promises, to esteem, love, and desire heavenly things only, and to bear with patience and tranquillity all the losses and evils of this life, upon the prospect and hope of that felicity which he has purchased for us.

And in his name shall the Gentiles trust. The former part of the text is omitted, "he shall not fail, nor be discouraged, till he have set judgment in the earth"; but is inserted in Munster's Hebrew Gospel; and which some understand of the bruised reed, and smoking flax, and others of Christ; the latter sense is to be preferred. The passage, here cited, is somewhat different in Isaiah: for there it is, "and the isles shall wait for his law"; but the difference, at least, in sense, is not so great as it may appear at first sight: for, as Grotius observes, does not always signify "islands", but nations, and countries, that are upon the continent, Genesis 10:5 and so might be rightly rendered here, the Gentiles, or "nations"; and by "the name" of Christ is meant his Gospel: see Acts 9:15 which Isaiah calls his "law": that is, his doctrine, the doctrine of righteousness, life, and salvation by him, which is the ground and foundation of hope, and trust in him; and they that wait for it, may be truly said to hope, or trust in it. This began to have its accomplishment in the Idumeans, Tyrians, and Sidonians, now attending on the ministry of Christ; and has had a greater accomplishment since: the Gospel having been preached in the Gentile world, both upon the main land, and in the isles afar off; whereby multitudes have been brought to hope, and believe in Christ, as their Saviour and Redeemer.

And in his name shall the Gentiles trust--Part of His present audience were Gentiles--from Tyre and Sidon--first-fruits of the great Gentile harvest contemplated in the prophecy.

In his name. In him as the Messiah.
Shall the Gentiles trust. He shall be the "Christ of the world," and not of the Jews alone. Compare John 4:42. The prophets clearly and many times declare that the Messiah shall be, not a Jewish, but a world's Savior. The Jews strangely overlooked this.

In his name - That is, in him.