Jerome : (Chapter 44, verse 1 and 2) Now listen, my servant Jacob, and Israel, whom I have chosen. Thus says the Lord, your maker and shaper from the womb, your helper. Do not fear, my servant Jacob, and you, whom I have chosen. LXX: But now hear, Jacob my servant, and Israel whom I have chosen. I am the Lord your God, who created you and formed you from the womb; you will still have my help. Do not fear, my servant Jacob, and beloved Israel whom I have chosen. When the people of Judah are accused of unbelief and blasphemy, they are called by simple names without any dignity: You have not called upon me, O Jacob, neither have you labored about me, O Israel; and again: I have given Jacob to utter destruction, and Israel to reproaches. But when he speaks to the choir of the Apostles, who are from the Jews, the privileges of their names are also joined. Listen, Jacob my servant, and Israel whom I have chosen: that servitude be first, election second. Thus says the Lord, your maker and your creator, who aided you in the womb (Gen. XXV): that even in the womb of your mother you would grasp the heel of your brother. Or who, at the beginning of the nascent Church, preserved you from persecutors. Do not fear their cruelty, my servant Jacob, whom I have chosen. He is also called Israel; Isurun in Hebrew, and the others, the most upright or the straightest. Only the LXX called him the most beloved, combining it with their own, Israel. Specifically, according to the Hebrews and the faith of the scriptures, Israel is called the upright one of God. But a man who sees God is not in the elements, but in the sound of his voice. And the book of Genesis is called εὐθεῖς, that is, the book of the righteous: Abraham, Isaac, and Israel. — Commentary on Isaiah