Yeremia 35:6-7

Rekhab : a clan of Judah,son of Rimmon of Benjamin; a captain in Saul's army,father of Jehonadab, a friend of Jehu, King of Israel,father of Malchijah, ruler of the district of Beth-Haccherem

Yonadab : son of Shimeah, David's brother,son of Rechab whose clan was a good example of obeying ones elders