Mentioned in the Bible by name

Jehonadab

But Amnon had a friend named Jonadab, a son of David's brother Shimeah. [David's son Amnon and Jonadab were cousins. Shimeah means "fame"; in 1 Sam. 16:9 he is called Shammah.] And Jonadab was a very cunning man.

And Jonadav said to him, "Lie down on your bed and pretend to be sick, and when your father comes to see you, say to him, 'Let my sister Tamar come, I beg you, and give me bread to eat, and prepare the food before my eyes so that I may see it and eat it from her hand.

But Jonadab, a son of David's brother Shimeah [verse 3], answered and said, "Let not my lord believe that they have killed all the young men, the king's sons, for Amnon is the only one who is dead, for Absalom has determined this and has been determined from the day he raped his sister Tamar.

And Jonadav said to the king, "Behold, the king's sons are coming, as your servant said."