Among - Or, because of. Israel is the chief or, first of the nations Deuteronomy 26:19, and Yahweh summons mankind to rejoice, because the remnant of Israel is about to be restored to its old position.
Related Commentaries of Jeremiah 31:7
Jeremiah 31:7
7 For thus saith the LORD; Sing with gladness for Jacob, and shout among the chief of the nations: publish ye, praise ye, and say, O LORD, save thy people, the remnant of Israel.