The Imperial Family

This family was in the direct line of Kahles. They were all put to death at the end of the second destiny of the Klingon Empire.

Colonial Worf

He was a Klingon advocate in the late 23rd century. In 2293 he represented Kirk and McCoy for killing Chancellor Gorkon. However, he couldn't prevent their conviction.

Duras

Being the son of Ja'rod, he was a political figure who was very powerful and ambitious.  He lived in tje late 24th century. His family was notorious for dishonorable and at times treasonous tactics in order to maintain their power.

He was a member of the High Counsel.  There were records of his father having betrayed the Kitamor Colony to The Romulon Empire, however the blame was shifted to Mogh, the father of Worf. Worf killed him in a duel which followed the Klingon Law.