Jehonadab (Hebrew: יְהוֹנָדָב; "YHWH is willing"; Latin: Jonadab) was the son of Rechab.
A Kenite, he was a supporter of Jehu, son of Nimshi, in the elimination of the house of Ahab and in suppressing worship of Baal throughout Samaria.
Jehu seeks his support at a meeting in the desert and assures Jehonadab of his "zeal for the Lord".
At Jeremiah 35:6-19, his followers are commended for adhering to his instructions, and God promises that his lineage will continue.
Jehovah's Witnesses use the terms Jonadabs or Jehonadabs to refer to Christians who hope to live forever on earth, rather than in heaven.