De nämndes inte i böckerna - men JKR sa att hon hade mer.

In the very earliest list of ghosts I ever wrote for Hogwarts, I included Myrtle (initially named ‘Wailing Wanda’), Professor Binns, the Grey Lady (then called ‘the Whispering Lady’) and the Bloody Baron. There was also a Black Knight, The Toad (which left ectoplasm all over its classroom), and a ghost I rather regret not using: his name was Edmund Grubb, and the notes beside his name say: ‘Expired in the doorway of the Dining Hall. Sometimes stops people getting in, out of spite. Fat Victorian ghost. (Ate poisonous berries).’
Hogwarts Ghosts (Pottermore)

I böckerna används emellertid inga av dessa namn - de andra 14 (eller 13 om man räknar Peeves Poltergeist) är inte namngivna, på samma sätt som vi inte vet namnen på varje elev på Hogwarts, fastän vi vet det finns mer än de namngivna.

De verkade vara invånare - de argumenterade för Peeves.

De tjugo spöken som pratade med varandra talade om Peeves, och vad de skulle göra åt honom. Det verkar inte som om den Headless Hunt eller andra besökande spöken skulle diskuteras.

“He gasped. So did the people around him. About twenty ghosts had just streamed through the back wall. Pearly-white and slightly transparent, they glided across the room talking to each other and hardly glancing at the first-years. They seemed to be arguing. What looked like a fat little monk was saying, ‘Forgive and forget, I say, we ought to give him a second chance –’

‘My dear Friar, haven’t we given Peeves all the chances he deserves? He gives us all a bad name and you know, he’s not really even a ghost – I say, what are you all doing here?”
- Harry Potter and the Philosopher's Stone, Chapter 7 (The Sorting Hat)

Eftersom spökena alla tycks argumentera för Peeves, ett problem som är unikt för Hogwarts som besökare troligtvis inte bryr sig tillräckligt för att argumentera över, verkar det troligt att spökena som är inblandade i den konversationen var boende i Hogwarts.

Medan de aldrig dykt upp i böckerna nämns tre spökar i Rowlings utkast.

• Black Knight

• Thead - "vänster ektoplasma över hela klassrummet"

• Edmund Grubb - "Förfallit i matsalens dörröppning. Ibland hindrar människor att komma in, otroligt. Fet viktorianskt spöke (Ate giftiga bär)."

In the very earliest list of ghosts I ever wrote for Hogwarts, I included Myrtle (initially named ‘Wailing Wanda’), Professor Binns, the Grey Lady (then called ‘the Whispering Lady’) and the Bloody Baron. There was also a Black Knight, The Toad (which left ectoplasm all over its classroom), and a ghost I rather regret not using: his name was Edmund Grubb, and the notes beside his name say: ‘Expired in the doorway of the Dining Hall. Sometimes stops people getting in, out of spite. Fat Victorian ghost. (Ate poisonous berries).’

Pottermore - Hogwarts Ghosts

CBS 60 Minutes - J.K. Rowling - September 1999