This Bible contradiction is from the Skeptic's Annotated Bible.
Jehu was the son of Nimshi.
1 Kings 19:16 View context
And Jehu the son of Nimshi shalt thou anoint [to be] king over Israel: and Elisha the son of Shaphat of Abelmeholah shalt thou anoint [to be] prophet in thy room.
Jehu was the grandson of Nimshi.
2 Kings 9:2 View context
And when thou comest thither, look out there Jehu the son of Jehoshaphat the son of Nimshi, and go in, and make him arise up from among his brethren, and carry him to an inner chamber;