Noggra, son of Doqi

Noggra was a Klingon male who headed the House of Noggra and was a friend of the House of Mogh.

In 2372, Worf contacted him and asked for him to say he was the father of Kurn, now Rodek. Worf had come to realise wiping Kurn's memory was the only way to stop him from committing suicide, a dishonorable act in Klingon society. Noggra came to Deep Space 9 and Kurn left with him. 

When his son left to join the Klingon Defense Force, Noggra gave him a recording of the song Mahk Jchi. 

By 2376, Noggra and Worf were still the only people in the Klingon Empire who knew Rodek's true identity.