What is the name of Worf's Klingon house?

Worf’s Klingon house is House of Mogh. Worf is formally known as Worf, son of Mogh, taking his identity from his biological father and the powerful Klingon family to which he belongs.

The House of Mogh is introduced through Worf’s family history and becomes central to the TNG story arc involving his brother Kurn, the rival House of Duras, and the accusation that Mogh betrayed the Klingon Empire. Worf later accepts ritual discommendation to protect his house from political retaliation.

Worf was raised by the human Rozhenko family after the Khitomer Massacre, but he continued to identify with Klingon culture and his birth house. A frequent mix-up is House of Martok: Worf joins that house later in Deep Space Nine, after the House of Mogh has been stripped of its status.