One shall say, I am the Lord’s. — The words paint, like Psalms 87:4-5, the eagerness of heathen proselytes to attach themselves to Israel. The forms of adhesion rise in emphasis: (1) the convert declares himself to belong to Jehovah; (2) he calls upon the name of Jacob; (3) he writes upon his hand, To Jehovah! — brands himself, as it were, as His servant (comp. Ezekiel 9:4), as showing that the prohibition of idolatrous marks (Leviticus 19:28) did not exclude this; and see also Revelation 7:3; Revelation 9:4; (4) he takes the name of Israel in addition to his own as a title of honour.
Related Commentaries of Isaiah 44:5
Isaiah 44:5
5 One shall say, I am the LORD'S; and another shall call himself by the name of Jacob; and another shall subscribe with his hand unto the LORD, and surname himself by the name of Israel.