Isaiah 62:2

All the Gentiles would see Israel’s righteousness and her reflected glory. Her new name, that sovereign Yahweh would give her, would identify the change in her character (cf. Genesis 32:28).

"So often in the OT a new name (Isaiah 62:2) is the pledge of divine action to change the status or character of a person (cf., e.g., Genesis 17:5; Genesis 17:15[; John 1:42])." [Note: Grogan, p. 336.]