NET
3 Now Amnon had a friend named Jonadab, the son of David’s brother Shimeah. Jonadab was a very crafty man.
Darby
3 And Amnon had a friend whose name was Jonadab, the son of Shimeah David's brother; and Jonadab was a very shrewd man.
KJV
3 But Amnon had a friend, whose name [was] Jonadab, the son of Shimeah David's brother: and Jonadab [was] a very subtil man.