B'Ettak was a female Klingon of the House of Varnak in the 24th century. She was the mate of Koradan and the mother of Eral.

When her daughter bore a son by one of their house servants, B'Ettak and Koradan had Eral exiled from their house without honor, and had the infant handed over to a cousin.

B'Ettak was presumably put to death, along with the entire House of Varnak, when they gave their support to Morjod during his attempted coup in 2375. (GKN novel: A Good Day to Die; KE novel: A Burning House)