In Isaiah 4166 Christ is revealed as the Servant of Jehovah in the most thorough and complete way. Since Jehovah is the Triune God, Christ as the Servant of Jehovah is the Servant of the Triune God.
This section of Isaiah uses three persons as types of Christ as the Servant of Jehovah: Isaiah the prophet, Cyrus king of Persia, and Israel. These three types are the key to understanding this portion of the Word.
In Isaiah 41:1-7 Christ is typified by Cyrus the king of Persia.
Cyrus was raised up by Jehovah (vv. 2a, 25a; Acts 3:26).
Isaiah 41:25b indicates that Cyrus called upon the name of Jehovah.
Cyrus was raised up by Jehovah to subdue the nations and have dominion over the kings (vv. 2b, 25c; Ezra 1:2a; Acts 5:31a; Rev. 1:5a).