House Wibberley is a noble house from Westeros.
Samwell Tarly presents some paperwork to Lord Commander Jon Snow consisting of requests to various noble Houses to send new recruits to the Night's Watch. Few Houses can spare any men during the War of the Five Kings so the Watch is left scraping the bottom of the barrel: the requests are mostly to minor lords that Jon says he hasn't even heard of, including Lord Ashford, Lady Caulfield, Lord Smallwood, Lord Mazin, and Lord Wibberley.
- Lord Wibberley, head of the house.
In the books
In the A Song of Ice and Fire novels, there is no mention of any House Wibberley. The episode itself makes a joke about this when Jon Snow remarks that he has "never even heard of these people".
The House names mentioned in "Sons of the Harpy" were in-joke references to friends of the TV writers: "House Caulfield" (specifically "Lady Caulfield") for Bernadette Caulfield, a producer on the TV show; "House Mazin" refers to Craig Mazin, a fellow scriptwriter who gave the showrunners advice on the unaired pilot episode. "House Wibberley" is similarly a reference to Cormac and Marianne Wibberley, a married team of scriptwriters who are also friends of the TV show writers.