Jonadab is the name of two men in the Hebrew Bible:

• In 2 Samuel 13:3 Jonadab son of Shimeah is described as a 'very shrewd man' (NIV). He suggests to Amnon the plan he uses to seduce Tamar, and is later implicated in the murder of Amnon by Absalom.
• In the Book of Jeremiah, Jonadab is the name given to Jehonadab.