|Leader||Matron Holtavoma Udrinor|
|Scope||National (all drow society)|
|Members||Followers of Cyth-V'sug|
Source: Endless Night, pg(s). 52
The drow of House Udrinor fill the storehouses of Zirnakaynin by virtue of their control over the production and trade in edible fungus within the area of the city. As a sideline they also dispose of bodies within the city using them as compost for their crop or sacrifices to Cyth-V'sug, their patron demon lord. Matron Holtavoma Udrinor is the current head of the house and a familiar figure about the city and in the holdings of her house.
- Holtavoma Udrinor, Matron of the House