3 Now Amnon had an adviser named Jonadab son of Shimeah, David’s brother. Jonadab was a very shrewd man.

Read 2 Samuel 13:3 Using Other Translations

But Amnon had a friend, whose name was Jonadab, the son of Shimeah David's brother: and Jonadab was a very subtil man.
But Amnon had a friend, whose name was Jonadab, the son of Shimeah, David's brother. And Jonadab was a very crafty man.
But Amnon had a very crafty friend—his cousin Jonadab. He was the son of David’s brother Shimea.